Backlight unit and display device having backlight unit

ABSTRACT

A backlight unit is discussed, which includes a frame including a bottom and a sidewall extending from the bottom; at least one substrate located on the frame, and a plurality of light sources mount on the at least one substrate; and a reflecting sheet located on the at least one substrate, wherein the reflecting sheet includes: a first sheet part located on the bottom, the first sheet part including a plurality of holes corresponding to the plurality of the light sources; a second sheet part extended from the first sheet; and a third sheet part extended from the second sheet part and located on the sidewall; wherein the second sheet part comprises a plurality of dot areas positioned sequentially in a direction from the first sheet part to the third sheet part and the plurality of dot areas include a first dot area and a second dot area, the first dot area including a plurality of dots having the same size and the second dot area including a plurality of dots having the same size, and wherein a size of the plurality of dots in the first dot area is different from a size of the plurality of dots in the second dot area.

This application claims the benefit of U.S. Provisional Application No.62/073,509 filed on Oct. 31, 2014, and the priority benefit of KoreanPatent Application No. 10-2015-0109155 and Korean Patent Application No.10-2015-0109165, both filed in the Korean Intellectual Property Officeon Jul. 31, 2015, the entire contents of which are incorporated hereinby reference for all purposes as if fully set forth herein.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present disclosure relates to a backlight unit and a display deviceincluding the backlight unit.

2. Discussion of the Related Art

With the development of the information society, various demands fordisplay devices have been increasing. Various display devices, such asliquid crystal displays (LCDs), plasma display panels (PDPs),electroluminescent displays (ELDs), and vacuum fluorescent displays(VFDs), have been recently studied and used to meet various demands forthe display devices.

Among the display devices, a liquid crystal display panel of the liquidcrystal display includes a liquid crystal layer, and a thin filmtransistor (TFT) substrate and a color filter substrate which arepositioned opposite each other with the liquid crystal layer interposedthere between. The liquid crystal display panel displays an image usinglight provided by a backlight unit of the liquid crystal display.

SUMMARY OF THE INVENTION

The present disclosure provides a backlight unit including a reflectingsheet having a dot area.

In one aspect, there is a backlight unit including a frame including abottom and a sidewall extending from the bottom; at least one substratelocated on the frame, and a plurality of light sources mounted on the atleast one substrate; and a reflecting sheet located on the at least onesubstrate, wherein the reflecting sheet including: a first sheet partlocated on the bottom, the first sheet part including a plurality ofholes corresponding to the plurality of the light sources; a secondsheet part extended from the first sheet; and a third sheet partextended from the second sheet part and located on the sidewall; whereinthe second sheet part includes a plurality of dot areas positionedsequentially in a direction from the first sheet part to the third sheetpart and the plurality of dot areas including a first area and a seconddot area, the first dot area including a plurality of dots having thesame size and the second dot area including a plurality of dots havingthe same size, and wherein a size of the plurality of dots in the firstdot area is different from a size of the plurality of dots in the seconddot area.

The backlight unit may further include at least one of a diffusion plateand an optical sheet positioned on the reflecting sheet.

The backlight unit may further include a plurality of lenses positionedon the plurality of light sources.

The backlight unit may further include a plurality of pins fixing thereflecting sheet to the frame.

The plurality of pins may be arranged outside the plurality of holes.

The plurality of pins may be arranged in a row.

The first sheet part and the second sheet part may be delineated by theplurality of pins.

At least one of the plurality of pins may be positioned between at leasttwo outermost holes among the plurality of holes positioned on a shortside of the reflecting sheet.

A distance between a dot area on a long side of the reflecting sheet andan outermost hole of the plurality of holes on the long side may begreater than a distance between a dot area on a short side of thereflecting sheet and an outermost hole of the plurality of holes on theshort side.

A bent area may be positioned at a boundary between the first sheet partand the second sheet part and a boundary between the second sheet partand third sheet part.

The second sheet part may be rounded.

A slope of the second sheet part may increase as the slope goes towardsthe third sheet part.

Sizes of the plurality of dots in the second sheet area may varydepending on an increase in the slope.

The sizes of the plurality of dots in the second sheet area may increaseas the slope increases.

In a corner of the reflecting sheet, a shape of a dot area on a longside of the reflecting sheet and a shape of a dot area on a short sideof the reflecting sheet may be asymmetric.

The backlight unit may further include a cutting line on a corner of thereflecting sheet. A distance between a specific point on the cuttingline and a dot nearest to the cutting line in a direction parallel to along side of the reflecting sheet may be different from a distancebetween the specific point and a dot nearest to the cutting line in adirection parallel to a short side of the reflecting sheet.

The second sheet area may include a non-dot area adjacent to the thirdsheet part.

A width of the non-dot area may be greater than a distance betweenadjacent dots of the plurality of dots.

The first sheet part and the third sheet part may contact the frame, andthe second sheet part may be separated from the frame.

A distance between adjacent dots of the plurality of dots in the firstdot area may be different from a distance between adjacent dots of theplurality of dots in the second dot area.

The first dot area may be located closer to the first sheet part thanthe second dot area.

In another aspect, there is a backlight unit including a frame includinga bottom and a sidewall extending from the bottom; at least onesubstrate located on the frame, and a plurality of light sources mountedon the at least one substrate; and a reflecting sheet located on the atleast one substrate, wherein the reflecting sheet including: a firstsheet part located on the bottom, the first sheet part including aplurality of holes corresponding to the plurality of the light sources;a second sheet part extended from the first sheet; and a third sheetpart extended from the second sheet part and located on the sidewall;wherein the second sheet part includes a plurality of dot areaspositioned sequentially in a direction from the first sheet part to thethird sheet part and the plurality of dot areas include a first dot areaand a second dot area, the first dot area including a plurality of dotshaving the same size and the second dot area including a plurality ofdots having the same size, wherein a distance of adjacent dots of theplurality of dots in the first dot area is different from a distance ofadjacent dots of the plurality of dots in the second dot area.

In another aspect, there is a display device including: a frameincluding a bottom and a sidewall extending from the bottom; at leastone substrate located on the frame, and a plurality of light sourcesmounted on the at least one substrate; a reflecting sheet located on theat least one substrate; an optical sheet located on the reflectingsheet; and a display panel located on the optical sheet, wherein thereflecting sheet including: a first sheet part located on the bottom,the first sheet part including a plurality of holes corresponding to theplurality of the light sources; a second sheet part extended from thefirst sheet; and a third sheet part extended from the second sheet partand located on the sidewall; wherein the second sheet part includes aplurality of dot areas positioned sequentially in a direction from thefirst sheet part to the third sheet part and the plurality of dot areasincluding a first dot area and a second dot area, the first dot areaincluding a plurality of dots having the same size and the second dotarea including a plurality of dots having the same size, wherein a sizeof the plurality of dots in the first dot area is different from a sizeof the plurality of dots in the second dot area.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this specification, illustrate embodiments of the invention andtogether with the description serve to explain the principles of theinvention. In the drawings:

FIGS. 1 and 2 illustrate a display device according to an exampleembodiment of the invention;

FIGS. 3 to 7 illustrate configuration of a display device related to anexample embodiment of the invention;

FIGS. 8 and 9 illustrate a light source according to an exampleembodiment of the invention;

FIG. 10 illustrates a connection relationship between a reflecting sheetand components around the reflecting sheet according to an exampleembodiment of the invention;

FIGS. 11 to 13 illustrate configuration of a reflecting sheet accordingto an example embodiment of the invention;

FIGS. 14 to 23B illustrate a dot distribution of a reflecting sheetaccording to an example embodiment of the invention;

FIGS. 24 and 25 illustrate a reflecting sheet according to an exampleembodiment of the invention;

FIGS. 26 to 28 illustrate configuration of a cutting portion of areflecting sheet according to an example embodiment of the invention;

FIGS. 29 and 30 illustrate a dot area according to an example embodimentof the invention;

FIGS. 31 to 38 illustrate configuration related to a lens hole of areflecting sheet according to an example embodiment of the invention;

FIGS. 39 to 43 illustrate configuration related to a lens holereflecting sheet according to an example embodiment of the invention;

FIGS. 44 and 45 illustrate configuration related to horizontal andvertical coupling units of a reflecting sheet according to an exampleembodiment of the invention;

FIGS. 46 to 48B illustrate configuration related to a cutting portion ofa reflecting sheet according to an example embodiment of the invention;

FIGS. 49 and 50 illustrate configuration related to a supporter hole ofa reflecting sheet according to an example embodiment of the invention;

FIG. 51 shows a light assembly including a light source shown in FIG.19;

FIGS. 52 and 53 show a lens according to an example embodiment of theinvention;

FIG. 54 shows an example of a light path of a lens shown in FIG. 52;

FIGS. 55 to 60 show a lens according to another example embodiment ofthe invention; and

FIGS. 61 and 62 show a disposition of a light assembly according toanother example embodiment of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Reference will now be made in detail to embodiments of the invention,examples of which are illustrated in the accompanying drawings. Whereverpossible, the same reference numbers will be used throughout thedrawings to refer to the same or like parts. A suffix such as “module”and “unit”” may be assigned or used interchangeably to refer to elementsor components. Use of such a suffix herein is merely intended tofacilitate the description of the embodiments of the invention, and thesuffix itself is not intended to give any special meaning or function.It will be paid attention that detailed description of known arts willbe omitted if it is determined that the detailed description of the knowarts can obscure the embodiments of the invention. The accompanyingdrawings are merely intended to easily describe the embodiments of theinvention, and the spirit and technical scope of the present inventionis not limited by the accompanying drawings. It should be understoodthat the present invention is not limited to specific disclosedembodiments, but includes all modifications, equivalents and substitutesincluded within the spirit and technical scope of the present invention.

Hereinafter, the embodiments of the invention are described using aliquid crystal display panel as an example of a display panel. Otherdisplay panels may be used. For example, a plasma display panel (PDP), afield emission display (FED) panel, and an organic light emitting diode(OLED) display panel may be used.

In what follows, a display panel may include a first long side LS1, asecond long side LS2 opposite the first long side LS1, a first shortside SS1 adjacent to the first long side LS1 and the second long sideLS2, and a second short side SS2 opposite the first short side SS1.

In the embodiment disclosed herein, the first short side SS1 may bereferred to as a first side area; the second short side SS2 may bereferred to as a second side area opposite the first side area; thefirst long side LS1 may be referred to as a third side area which isadjacent to the first side area and the second side area and ispositioned between the first side area and the second side area; and thesecond long side LS2 may be referred to as a fourth side area which isadjacent to the first side area and the second side area, is positionedbetween the first side area and the second side area, and is opposite tothe third side area.

The embodiment of the invention describes that lengths of the first andsecond long sides LS1 and LS2 are longer than lengths of the first andsecond short sides SS1 and SS2 for the sake of brevity and ease ofreading. However, the lengths of the first and second long sides LS1 andLS2 may be almost equal to the lengths of the first and second shortsides SS1 and SS2.

In the following description, a first direction DR1 may be a directionparallel to the long sides LS1 and LS2 of the display panel, and asecond direction DR2 may be a direction parallel to the short sides SS1and SS2 of the display panel.

Further, a third direction DR3 may be a direction vertical to the firstdirection DR1 and/or the second direction DR2.

In the embodiment disclosed herein, the first direction DR1 and thesecond direction DR2 may be commonly referred to as a horizontaldirection.

Further, the third direction DR3 may be referred to as a verticaldirection.

FIGS. 1 and 2 illustrate a display device according to an exampleembodiment of the invention.

As shown in FIGS. 1 and 2, a display device 100 according to theembodiment of the invention may include a display panel 110 and a backcover 150 positioned in the rear of the display panel 110.

The back cover 150 may be connected to the display panel 110 in asliding manner in a direction (i.e., the second direction DR2) from thefirst long side LS1 to the second long side LS2. In other words, theback cover 150 may be inserted into the first short side SS1, the secondshort side SS2 opposite the first short side SS1, and the first longside LS1 which is adjacent to the first and second short sides SS1 andSS2 and is positioned between the first short side SS1 and the secondshort side SS2, of the display panel 110 in the sliding manner.

The back cover 150 and/or other components adjacent to the back cover150 may include a protrusion, a sliding unit, a connection unit, etc.,so that the back cover 150 is connected to the display panel 110 in thesliding manner.

FIGS. 3 to 7 illustrate configuration of a display device related to theembodiment of the invention.

As shown in FIG. 3, the display device 100 according to the embodimentof the invention may include a front cover 105, the display panel 110, abacklight unit 120, a frame 130, and the back cover 150.

The front cover 105 may cover at least a portion of a front surface anda side surface of the display panel 110. The front cover 105 may have arectangular fame shape, in which a center portion is empty. Because thecenter portion of the front cover 105 is empty, an image displayed onthe display panel 110 may be seen to the outside.

The front cover 105 may include a front cover and a side cover. Namely,the front cover 105 may include the front cover positioned at the frontsurface of the display panel 110 and the side cover at the side surfaceof the display panel 110. The front cover and the side cover may beseparately configured. One of the front cover and the side cover may beomitted. For example, the front cover may be omitted, and only the sidecover may be absent in terms of a beautiful appearance of the displaydevice 100.

The display panel 110 may be positioned in front of the display device100 and may display an image. The display panel 110 may divide the imageinto a plurality of pixels and may output the image while controllingcolor, brightness, and chroma of each pixel. The display panel 110 mayinclude an active area, on which the image is displayed, and an inactivearea, on which the image is not displayed. The display panel 110 mayinclude a front substrate and a back substrate which are positionedopposite each other with a liquid crystal layer interposed therebetween.

The front substrate may include a plurality of pixels each includingred, green, and blue subpixels. The front substrate may generate animage corresponding to the red, green, or blue color in response to acontrol signal.

The back substrate may include switching elements. The back substratemay turn on pixel electrodes. For example, the pixel electrode maychange a molecule arrangement of the liquid crystal layer in response toa control signal received from the outside. The liquid crystal layer mayinclude a plurality of liquid crystal molecules. The arrangement of theliquid crystal molecules may change depending on a voltage differencebetween the pixel electrode and a common electrode. The liquid crystallayer may transmit light provided by the backlight unit 120 to the frontsubstrate.

The backlight unit 120 may be positioned at a back surface of thedisplay panel 110. The backlight unit 120 may include a plurality oflight sources. The light sources of the backlight unit 120 may bearranged in an edge type or a direct type. In the instance of the edgetype backlight unit 120, a light guide plate may be added.

The backlight unit 120 may be coupled to a front surface of the frame130. For example, the plurality of light sources may be disposed at thefront surface of the frame 130. In this instance, the backlight unit 120may be commonly called the direct type backlight unit 120.

The backlight unit 120 may be driven in an entire driving method or apartial driving method such as a local dimming method and an impulsivedriving method. The backlight unit 120 may include an optical sheet 125and an optical layer 123.

The optical sheet 125 can cause light of the light sources to beuniformly transferred to the display panel 110. The optical sheet 125may include a plurality of layers. For example, the optical sheet 125may include at least one prism sheet and/or at least one diffusionsheet.

The optical sheet 125 may further include at least one coupling unit 125d. The coupling unit 125 d may be coupled to the front cover 105 and/orthe back cover 150. Namely, the coupling unit 125 d may be directlycoupled to the front cover 105 and/or the back cover 150. Alternatively,the coupling unit 125 d may be coupled to a structure formed on thefront cover 105 and/or the back cover 150. Namely, the coupling unit 125d may be indirectly coupled to the front cover 105 and/or the back cover150.

The optical layer 123 may include the light source, etc. The detailedconfiguration of the optical layer 123 will be described in thecorresponding paragraphs.

The frame 130 may support components constituting the display device100. For example, the frame 130 may be coupled to the backlight unit120. The frame 130 may be formed of a metal material, for example, analuminum alloy.

The back cover 150 may be positioned at a back surface of the displaydevice 100. The back cover 150 may protect inner configuration of thedisplay device 100 from the outside. At least a portion of the backcover 150 may be coupled to the frame 130 and/or the front cover 105.The back cover 150 may be an injection production (or injection molded)formed of a resin material.

FIG. 4 shows the configuration of the optical sheet 125.

As shown in (a) of FIG. 4, the optical sheet 125 and/or a diffusionplate 129 may be positioned on the frame 130. The optical sheet 125and/or the diffusion plate 129 may be coupled to the frame 130 at anedge of the frame 130. The optical sheet 125 and/or the diffusion plate129 may be directly placed at the edge of the frame 130. Namely, anouter perimeter of the optical sheet 125 and/or the diffusion plate 129may be supported by the frame 130. An upper surface of an edge of theoptical sheet 125 and/or the diffusion plate 129 may be surrounded by afirst guide panel 117. For example, the optical sheet 125 and/or thediffusion plate 129 may be positioned between the edge of the frame 130and a flange 117 a of the first guide panel 117.

The display panel 110 may be positioned at a front surface of theoptical sheet 125. An edge of the display panel 110 may be coupled tothe first guide panel 117. Namely, the display panel 110 may besupported by the first guide panel 117.

An edge area of the front surface of the display panel 110 may besurrounded by the front cover 105. For example, the display panel 110may be positioned between the first guide panel 117 and the front cover105.

As shown in (b) of FIG. 4, the display device 100 according to theembodiment of the invention may further include a second guide panel113. The optical sheet 125 and/or the diffusion plate 129 may be coupledto the second guide panel 113. Namely, the second guide panel 113 mayhave a shape, in which the second guide panel 113 is coupled to theframe 130 and the optical sheet 125 and/or the diffusion plate 129are/is coupled to the second guide panel 113. The second guide panel 113may be formed of a material different from the frame 130. The frame 130may have a shape surrounding the first and second guide panels 117 and113.

As shown in (c) of FIG. 4, in the display device 100 according to theembodiment of the invention, the front cover 105 may not cover the frontsurface of the display panel 110. Namely, one end of the front cover 105may be positioned on the side of the display panel 110.

Referring to FIGS. 5 and 6, the backlight unit 120 may include theoptical layer 123 including substrates 122, at least one light assembly124, a reflecting sheet 126 and the diffusion plate 129, and the opticalsheet 125 positioned on a front surface of the optical layer 123.

The substrates 122 may include a plurality of straps, which extend in afirst direction and are separated from one another by a predetermineddistance in a second direction perpendicular to the first direction.

At least one light assembly 124 may be mounted on the substrate 122. Thesubstrate 122 may have an electrode pattern for connecting an adaptor tothe light assembly 124. For example, a carbon nanotube electrode patternfor connecting the adaptor to the light assembly 124 may be formed onthe substrate 122.

The substrate 122 may be formed of at least one of polyethyleneterephthalate (PET), glass, polycarbonate (PC), and silicon. Thesubstrate 122 may be a printed circuit board (PCB), on which at leastone light assembly 124 is mounted.

The light assemblies 124 may be disposed on the substrate 122 atpredetermined intervals in the first direction. A diameter of the lightassembly 124 may be greater than a width of the substrate 122. Namely,the diameter of the light assembly 124 may be greater than a length ofthe substrate 122 in the second direction.

The light assembly 124 may be one of a light emitting diode (LED) chipand a LED package having at least one LED chip.

The light assembly 124 may be configured as a colored LED emitting atleast one of red, green, and blue light or a white LED. The colored LEDmay include at least one of a red LED, a green LED, and a blue LED.

The light source included in the light assembly 124 may be a COB(Chip-On-Board) type. The COB light source may have a configuration, inwhich the LED chip as the light source is directly coupled to thesubstrate 122. Thus, the process may be simplified. Further, aresistance may be reduced, and a loss of energy resulting from heat maybe reduced. Namely, power efficiency of the light assembly 124 mayincrease. The COB light source can provide the brighter lighting and maybe implemented to be thinner and lighter than a related art.

The reflecting sheet 126 may be positioned at the front surface of thesubstrate 122. The reflecting sheet 126 may be positioned in an areaexcluding a formation area of the light assemblies 124 of the substrates122. Namely, the reflecting sheet 126 may have a plurality of holes 235.

The reflecting sheet 126 may reflect light emitted from the lightassembly 124 to a front surface of the reflecting sheet 126. Further,the reflecting sheet 126 may again reflect light reflected from thediffusion plate 129.

The reflecting sheet 126 may include at least one of metal and metaloxide which are a reflection material. The reflecting sheet 126 mayinclude metal and/or metal oxide having a high reflectance, for example,aluminum (Al), silver (Ag), gold (Au), and titanium dioxide (TiO₂).

The reflecting sheet 126 may be formed by depositing and/or coating themetal or the metal oxide on the substrate 122. An ink including themetal material may be printed on the reflecting sheet 126. On thereflecting sheet 126, a deposition layer may be formed using a heatdeposition method, an evaporation method, or a vacuum deposition methodsuch as a sputtering method. On the reflecting sheet 126, a coatinglayer and/or a printing layer may be formed using a printing method, agravure coating method or a silk screen method.

An air gap may be positioned between the reflecting sheet 126 and thediffusion plate 129. The air gap may serve as a buffer capable of widelyspreading light emitted from the light assembly 124. A supporter (orsupport plate) 200 may be positioned between the reflecting sheet 126and the diffusion plate 129, so as to maintain the air gap.

A resin may be deposited on the light assembly 124 and/or the reflectingsheet 126. The resin may function to diffuse light emitted from thelight assembly 124.

The diffusion plate 129 may upwardly diffuse light emitted from thelight assembly 124.

The optical sheet 125 may be positioned at a front surface of thediffusion plate 129. A back surface of the optical sheet 125 may beadhered to the diffusion plate 129, and a front surface of the opticalsheet 125 may be adhered to the back surface of the display panel 110.

The optical sheet 125 may include at least one sheet. More specifically,the optical sheet 125 may include one or more prism sheets and/or one ormore diffusion sheets. The plurality of sheets included in the opticalsheet 125 may be attached and/or adhered to one another.

In other words, the optical sheet 125 may include a plurality of sheetshaving different functions. For example, the optical sheet 125 mayinclude first to third optical sheets 125 a to 125 c. The first opticalsheets 125 a may function as a diffusion sheet, and the second and thirdoptical sheets 125 b and 125 c may function as a prism sheet. A numberand/or a position of the diffusion sheets and the prism sheets may bechanged. For example, the optical sheet 125 may include the firstoptical sheets 125 a as the diffusion sheet and the second optical sheet125 b as the prism sheet.

The diffusion sheet may prevent light coming from the diffusion platefrom being partially concentrated and may homogenize a luminance of thelight. The prism sheet may concentrate light coming from the diffusionsheet and may make the concentrated light be vertically incident on thedisplay panel 110.

The coupling unit 125 d may be formed on at least one of corners of theoptical sheet 125. The coupling unit 125 d may be formed in at least oneof the first to third optical sheets 125 a to 125 c.

The coupling unit 125 d may be formed at the corner on the long side ofthe optical sheet 125. The coupling unit 125 d formed on the first longside and the coupling unit 125 d formed on the second long side may beasymmetric. For example, a number and/or a position of the couplingunits 125 d formed on the first long side may be different from a numberand/or a position of the coupling units 125 d formed on the second longside.

Referring to FIG. 7, the substrates 122 including the plurality ofstraps, which extend in the first direction and are separated from oneanother by a predetermined distance in the second directionperpendicular to the first direction, may be provided on the frame 130.One end of each of the plurality of substrates 122 may be connected to aline electrode 232.

The line electrode 232 may extend in the second direction. The lineelectrode 232 may be connected to the ends of the substrates 122 atpredetermined intervals in the second direction. The substrates 122 maybe electrically connected to the adaptor through the line electrode 232.

The light assemblies 124 may be mounted on the substrate 122 atpredetermined intervals in the first direction. A diameter of the lightassembly 124 may be greater than a width of the substrate 122 in thesecond direction. Hence, an outer area of the light assembly 124 may bepositioned beyond a formation area of the substrate 122.

FIGS. 8 and 9 show a light source according to the embodiment of theinvention.

As shown in FIG. 8, a light source 203 may be a COB light source. TheCOB light source 203 may include at least one of an emission layer 135,first and second electrodes 147 and 149, and a fluorescent layer 137.

The emission layer 135 may be positioned on the substrate 122. Theemission layer 135 may emit one of red, green, and blue light. Theemission layer 135 may include one of Firpic, (CF3ppy) 2Ir(pic),9,10-di(2-naphthyl)anthracene(AND), perylene, distyrybiphenyl, PVK,OXD-7, UGH-3(Blue), and a combination thereof.

The first and second electrodes 147 and 149 may be positioned on bothsides of a lower surface of the emission layer 135. The first and secondelectrodes 147 and 149 may transmit an external driving signal to theemission layer 135.

The fluorescent layer 137 may cover the emission layer 135 and the firstand second electrodes 147 and 149. The fluorescent layer 137 may includea fluorescent material converting light of a spectrum generated from theemission layer 135 into white light. A thickness of the emission layer135 on the fluorescent layer 137 may be uniform. The fluorescent layer137 may have a refractive index of 1.4 to 2.0.

The COB light source 203 according to the embodiment of the inventionmay be directly mounted on the substrate 122. Thus, the size of thelight assembly 124 may decrease.

Because heat dissipation of the light sources 203 is excellent byforming the light sources 203 on the substrate 122, the light sources203 may be driven at a high current. Hence, a number of light sources203 required to secure the same light quantity may decrease.

Further, because the light sources 203 are mounted on the substrate 122,a wire bonding process may not be necessary. Hence, the manufacturingcost may be reduced due to the simplification of the manufacturingprocess.

As shown in FIG. 9, the light source 203 according to the embodiment ofthe invention may emit light in a first emission range EA1. Namely, thelight source 203 may emit light in the first emission range EA1including a second emission range EA2 of the front side and third andfourth emission ranges EA3 and EA4 of both sides. Thus, the light source203 according to the embodiment of the invention is different from arelated art POB light source emitting light in the second emission rangeEA2. In other words, the light source 203 according to the embodiment ofthe invention may be the COB light source, and the COB light source 203may emit light in a wide emission range including the side.

Because the COB light source 203 emits light even in a directioncorresponding to the third and fourth emission ranges EA3 and EA4 of theside, the embodiment of the invention needs to efficiently control lightof the side direction. The reflecting sheet according to the embodimentof the invention may control a reflectance of light emitted from thelight source 203 in the side direction. Thus, the embodiment of theinvention may reduce the non-uniformity of brightness resulting fromlight of the side direction.

FIG. 10 illustrates a connection relationship between the reflectingsheet and components around the reflecting sheet according to theembodiment of the invention.

As shown in FIG. 10, the reflecting sheet 126 according to theembodiment of the invention may be placed on the frame 130. For example,the reflecting sheet 126 may be coupled to a receiving unit 132 formedinside the frame 130.

The reflecting sheet 126 may include a horizontal coupling unit HH and avertical coupling unit VH. For example, coupling holes may be formedalong a long side and/or a short side of the reflecting sheet 126.

The horizontal coupling unit HH and the vertical coupling unit VH may beinserted into a horizontal protrusion 130H and/or a vertical protrusion130V formed on the frame 130. A guide panel GP may be formed on thereflecting sheet 126.

The guide panel GP may be formed of plastic material of injectionmolding or press processed metal material. The guide panel GP may becoupled to the horizontal protrusion 130H and/or the vertical protrusion130V. When the guide panel GP is coupled to the reflecting sheet 126,the reflecting sheet 126 may be fixed between the frame 30 and the guidepanel GP. FIG. 10 shows that the long sides and the short sides of theguide panel GP are separated from one another, as an example. The guidepanel GP, which the long sides and the short sides are connected to oneanother, may be used.

The reflecting sheet 126 placed on the frame 130 may be configured as athree-dimensional shape corresponding to a shape of the receiving unit132. Even when the reflecting sheet 126 according to the embodiment ofthe invention has the three-dimensional shape, the reflecting sheet 126can provide an optimum reflection effect. For example, the reflectingsheet 126 can uniformly reflect light throughout its entire area.

The reflecting sheet 126 may constitute a portion of the backlight unit120 (refer to FIG. 5). The substrate 122, on which the light sources 203are mounted, may be positioned between the reflecting sheet 126 and theframe 130.

The plurality of substrates 122 may be arranged in the horizontaldirection and/or the vertical direction. The substrates 122 may beconnected to signal lines 121 connected to a controller, etc., of thedisplay device 100. The signal lines 121 may be connected to thesubstrates 122 through holes formed in the frame 130.

The reflecting sheet 126 may include a plurality of lens holes 235. Theplurality of lens holes 235 may correspond to the light sources 203 onthe substrate 122. For example, the plurality of lens holes 235 may bearranged in the horizontal direction and/or the vertical directioncorrespondingly to the light sources 203. A lens 124 b may be insertedinto the lens hole 235. For example, the lens 124 b may be coupled tothe light source 203 through the lens hole 235.

The reflecting sheet 126 may include a plurality of support holes (orsupport plate holes) 205. A supporter 200 may be coupled to the supporthole 205. The supporter 200 may support the optical sheet 125 and/or thediffusion plate 129 positioned in front of the reflecting sheet 126.Namely, the reflecting sheet 126 may be separated from the optical sheet125 and/or the diffusion plate 129 at a predetermined distance.

The reflecting sheet 126 may include a plurality of fixing pin holes206. A fixing pin 202 may be coupled to the fixing pin hole 206. Also,the fixing pin 202 may be coupled to a frame hole 204 formed in theframe 130. Thus, the fixing pin 202 may fix the reflecting sheet 126 tothe frame 130.

FIGS. 11 to 13 illustrate configuration of the reflecting sheetaccording to the embodiment of the invention.

As shown in FIGS. 11 to 13, the reflecting sheet 126 according to theembodiment of the invention may be placed in an inner area of the frame130. The reflecting sheet 126 placed on the frame 130 may have thethree-dimensional shape corresponding to a shape of the frame 130.

As shown in FIG. 11, the frame 130 may include first to third frameareas 130 a to 130 c.

The first frame area 130 a may be a bottom surface of the frame 130. Thesecond frame area 130 b may be substantially flat. Namely, the secondframe area 130 b may be a surface positioned on an X-Y plane of thedisplay device 100.

The second frame area 130 b may be a sidewall surface extended upwardlyfrom the first frame area 130 a. The second frame area 130 b may extendin a direction parallel to a Z-axis direction or a direction inclined tothe Z-axis direction. The receiving unit 132 (refer to FIG. 10) may beformed inside the frame 130 by the second frame area 130 observing as asidewall of the frame 130.

The third frame area 130 c may be a surface extended from the secondframe area 130 b in an X-axis direction. The third frame area 130 c maybe substantially parallel to the first frame area 130 a. Namely, thethird frame area 130 c may be a flat surface in the same manner as thefirst frame area 130 a at a height level different from the first framearea 130 a by the second frame area 130 b.

The third frame area 130 c may include a protruding area. The thirdframe area 130 c may be coupled to a protrusion formed through aseparate process. The protruding area and/or the protrusion of the thirdframe area 130 c may be coupled to the reflecting sheet 126. Forexample, the protruding area and/or the protrusion of the third framearea 130 c may be coupled to a third sheet area 126 c of the reflectingsheet 126. The protruding area and/or the protrusion of the third framearea 130 c may be coupled to the optical sheet 125 (refer to FIG. 5).

The reflecting sheet 126 may be coupled to an area formed by the firstto third frame areas 130 a to 130 c of the frame 130. For example, thereflecting sheet 126 may be coupled to the first frame area 130 athrough the fixing pin 202. When a portion of the reflecting sheet 126is coupled to the first frame area 130 a through the fixing pin 202, theportion of the reflecting sheet 126 may naturally contact the frame 130.

When the reflecting sheet 126 is coupled to the frame 130 through thefixing pin 202, the shape of the reflecting sheet 126 may be naturallychanged depending on the shape of the frame 130. Namely, a naturallyrounded second sheet area 126 b of the reflecting sheet 126 may beformed. Thus, a separate process for forming a chamfer of the reflectingsheet 126 may not be necessary, and workability may be improved.

The reflecting sheet 126 may include first to third sheet areas 126 a to126 c. Namely, an area of the reflecting sheet 126 may be divideddepending on whether or not the reflecting sheet 126 and the frame 130contact each other. For example, the area of the reflecting sheet 126may be divided into a contact area contacting the frame 130 and anon-contact area not contacting the frame 130.

The area of the reflecting sheet 126 may be divided or delineated intothe first sheet area 126 a and the second sheet area 126 b by the fixingpin 202. In other words, the second sheet area 126 b may be an areabetween the fixing pin 202 and a portion contacting the third frame area130 c, Namely, the first sheet area 126 a and the second sheet area 126b may be determined depending on whether or not the reflecting sheet 126contacts the first frame area 130 a of the frame 130. The second sheetarea 126 b may be naturally separated from the frame 130 by propertiesand elasticity of the reflecting sheet 126. For example, when the firstsheet area 126 a is coupled to the frame 130 by the fixing pin 202, thesecond sheet area 126 b may naturally form a curved surface by its ownweight and may be separated from the frame 130. A separation space 130 dmay be formed between the second sheet area 126 b and the frame 130. Anangle formed by the second sheet area 126 b of the reflecting sheet 126and the bottom surface of the frame 130 may gradually increase. Namely,in the non-contact area of the reflecting sheet 126, the reflectingsheet 126 may have a two-dimensional curve shape. Thus, the second sheetarea 126 b may be separated from the frame 130 at a predetermined angle.

The third sheet area 126 c may be placed in the third frame area 130 c.The third sheet area 126 c may be coupled to the third frame area 130 c.Alternatively, the third sheet area 126 c may be naturally positioned onthe third frame area 130 c. Namely, the third sheet area 126 c maycontact the third frame area 130 c by elastic force of the Z-axisdirection resulting from the rounded second sheet area 126 b.

Light L may be emitted through the lens 124 b. Namely, light generatedin the light source 203 may be emitted to the outside through the lens124 b. The light L emitted through the lens 124 b may travel throughvarious paths. For example, a portion of the light L may travel througha path of the side direction of the lens 124 b.

The portion of the light L in the path of the side direction may traveltoward the second sheet area 126 b. At least a portion of lightgenerated in the light source 203 may be totally reflected inside thelens 124 b and may travel toward the second sheet area 126 b. In thisinstance, an amount of light L upwardly travelling in the second sheetarea 126 b may be more than an amount of light L downwardly travellingin the second sheet area 126 b. In other words, an amount and/or adensity of light L transferred to the reflecting sheet 126 may benon-uniform. When the amount and/or the density of the light L is notuniform, a viewer watching the display device 100 may perceivenon-uniformity of the amount and/or the density of the light L. Forexample, when an amount of light L incident on an upper portion of thesecond sheet area 126 b is more than an amount of light L incident on alower portion of the second sheet area 126 b, a corresponding area maybe recognized as being brighter than other areas because of the light Lreflected from the upper portion of the second sheet area 126 b.

As shown in FIG. 12, an angle formed by an extension line from aboundary between the first sheet area 126 a and the second sheet area126 b to a boundary between the second sheet area 126 b and the thirdsheet area 126 c and two straight lines parallel to the X-axis directionmay be called “A”. An inclined angle of the second sheet area 126 busing an intersection point P between the second sheet area 126 b and astraight line of the angle A as a starting point may increase. Namely,an angle of the second sheet area 126 b passing the intersection point Pin the X-axis direction may sharply increase.

Because the angle of the second sheet area 126 b passing theintersection point P increases, a density of the light L emitted fromthe lens 124 b (refer to FIG. 11) per unit area may further increase.Thus, a corresponding portion may be seen as being brighter than otherportions. As a result, the viewer may feel that the light is notuniform. The display device 100 according to the embodiment of theinvention can make light be uniformly reflected from the reflectingsheet 126. Hence, the viewer cannot feel or can feel less thenon-uniformity of the light.

As shown in FIG. 13, in the display device 100 according to theembodiment of the invention, dots DT may be formed in at least a portionof the reflecting sheet 126.

The dot DT may be an area having a pattern different from other areas.The dot DT may be an area of uneven portions (or concave-convexportions) formed on the reflecting sheet 126. The dot DT may be an area,in which at least a portion of the reflecting sheet 126 is colored. Forexample, the dot DT may be an area of a relatively dark color. Forexample, the dot DT may be a black or gray area. The dot DT may be anarea, in which the uneven portion and the colored portion are mixed witheach other. The dot DT may have a geometric shape, in which there is adifference in at least one of a shape, a size, a location, and a color.For example, the dot DT may be one of various shapes including a circle,an oval, a rectangle, a rod, a triangle, etc., formed on the reflectingsheet 126 and/or a combination of the various shapes.

The dots DT may affect a reflectance of a corresponding area. Namely,the dots DT may change a reflectance of light. For example, thereflectance of light may be reduced depending on at least one of ashape, a size, a location, and a color of the dot DT. The plurality ofdots DT may gather (or arranged) and form a dot area DA.

The dot area DA may be a gathering (or arranging) of the dots DT.Namely, the dot area DA may be a formation area of the plurality of dotsDT, which are the same as or different from one another in at least oneof a shape, a size, a location, and a color. For example, the dot areaDA may be formed in at least a portion of the second sheet area 126 b.As described above, a density of light per unit area in the second sheetarea 126 b may be high because of the inclined shape of the second sheetarea 126 b. The dot area DA may change a reflectance of light incidenton the second sheet area 126 b. In other words, a density of incidentlight per unit area is high, but a density of reflected light per unitarea may decrease. Thus, a phenomenon, in which a contrast of a portioncorresponding to the second sheet area 126 b is different from acontrast of other portions, may be prevented. Namely, light can beuniformly reflected from the entire reflecting sheet 126 because of thedot area DA. The dots DT constituting the dot area DA may be dividedinto a plurality of groups having different attributes. For example, aformation area of dots having a first attribute may be called a firstarea, and a formation area of dots having a second attribute may becalled a second area. Hereinafter, the dot area DA may be displayed bychanging the color, the density, etc., of the reflecting sheet 126, andareas having the different colors, densities, etc., may be formationareas of dots having different attributes even if a separate explanationis not given. For example, dots having different attributes may bedisposed in an area with a first color and an area with a second color.Namely, dots, which are different from one another in at least one ofthe size, the density, the color, and the interval, may be disposed indifferent areas.

The reflecting sheet 126 may further include anon-dot area NDA. Thenon-dot area NDA may be an area, in which there is no dot DT. Thenon-dot area NDA may be positioned in various areas of the reflectingsheet 126. For example, the non-dot area NDA may include first andsecond non-dot areas NDA1 and NDA2.

A width of the non-dot area NDA may be greater than a distance betweenadjacent dots. Namely, the width of the non-dot area NDA in a directionfrom the first sheet area 126 a to the third sheet area 126 c may begreater than a distance between two dots adjacent to the non-dot areaNDA. The width of the non-dot area NDA may be equal to or greater than 2mm.

The second non-dot area NDA2 may be positioned at a boundary between thesecond sheet area 126 b and the third sheet area 126 c. The secondnon-dot area NDA2 may be positioned in the second sheet area 126 b atthe boundary between the second sheet area 126 b and the third sheetarea 126 c.

The second non-dot area NDA2 may be an uppermost area of the secondsheet area 126 b and thus may be close to the optical sheet 125 and/orthe diffusion plate 129 positioned in front of the reflecting sheet 126.Hence, if the dot DT exists in the second non-dot area NDA2, the user ofthe display device 100 may observe the dot DT. Thus, the dot DT may notexist in the second non-dot area NDA2.

FIGS. 14 to 23 illustrate a dot distribution of the reflecting sheetaccording to the embodiment of the invention.

As shown in FIGS. 14 to 23, the dots DT of the reflecting sheet 126according to the embodiment of the invention may be disposed in variousshapes.

As shown in (a) of FIG. 14, the dots DT may be disposed in the dot areaDA. The adjacent dots DT may be separated from each other by a firstdistance O1. Namely, the dots DT may be disposed at regular intervals ofthe first distance O1.

The distance between the dots DT may affect the reflectance of thereflecting sheet 126. For example, when the distance between the dots DTdecreases, the reflectance may decrease.

As shown in (b) of FIG. 14, the adjacent dots DT may be separated fromeach other by the first distance O1, and the adjacent dots DT may beseparated from each other by a second distance O2. Namely, a distancebetween the dots DT may not be uniform

As shown in (a) of FIG. 15, the dot area DA may be divided into aplurality of areas. For example, the dot area DA may be divided into afirst area P1 and a second area P2. An attribute of dots DT included inthe first area P1 may be different from an attribute of dots DT includedin the second area P2. For example, at least one of a size, a density,and a color of a first dot DT1 in the first area P1 may be differentfrom at least one of a size, a density, and a color of a second dot DT2in the second area P2.

The second area P2 may be positioned further outside than the first areaP1. Namely, the second area P2 may be an area close to the third sheetarea 126 c. The second dot DT2 of the second area P2 may be larger thanthe first dot DT1 of the first area P1. Thus, a reflectance of thesecond area P2 may be less than a reflectance of the first area P1.

As shown in (b) of FIG. 15, the dot area DA may be divided into aplurality of areas. For example, the dot area DA may be divided intofirst to third areas P1 to P3. First to third dots DP1 to DP3 of thefirst to third areas P1 to P3 may have different attributes. Forexample, the second dot DT2 may be larger than the first dot DT1, andthe third dot DT3 may be larger than the second dot DT2. Alternatively,the first to third dots DP1 to DP3 have the same size, but a density ofthe first area P1 may be different from a density of the second area P2,and a density of the second area P2 may be different from a density ofthe third area P3. For example, the density of the first area P1 may beless than the density of the second area P2, and the density of thesecond area P2 may be less than the density of the third area P3.

As shown in FIG. 16, the dot area DA may not be divided into a pluralityof areas. However, dots DT included in the dot area DA may be differentfrom each other in at least one of a size, a density, and a color. Forexample, as the dot DT goes along the X-axis direction, the size of thedot DT may gradually increase. Namely, an attribute of the dot DTincluding at least one of the size, the density, and the color maygradually change.

As shown in (a) of FIG. 17, a size of the dot DT may gradually changedepending on a location.

As shown in (b) of FIG. 17, a size of the dot DT may sharply changedepending on a location. For example, the size of the dot DT may bechanged in a curve shape of a quadratic function.

As shown in FIG. 18, dots DT may be disposed in a horizontal dot areaHDA and a vertical dot area VDA in various shapes.

The horizontal dot area HDA may be a dot area DA formed on the long sideof the reflecting sheet 126, and a vertical dot area VDA may be a dotarea DA formed on the short side of the reflecting sheet 126. Detailedlocations of the horizontal dot area HDA and the vertical dot area VDAwill be described in corresponding paragraphs.

As shown in (a) of FIG. 18, the horizontal dot area HDA and/or thevertical dot area VDA may be divided into a plurality of areas. Forexample, the horizontal dot area HDA and/or the vertical dot area VDAmay be divided into an uppermost area A, a leftmost area B, a rightmostarea D, a lowermost area E, and/or a an inner area C. The horizontal dotarea HDA and/or the vertical dot area VDA may be divided in differentmanners.

Dots in the plurality of areas of the horizontal dot area HDA and/or thevertical dot area VDA may have different attributes. For example, a sizeand/or a density of a dot DT in the uppermost area A may be greater thana size and/or a density of a dot DT in the lowermost area E. A sizeand/or a density of a dot DT in the inner area C may be greater than asize and/or a density of dots DT in the leftmost area B and therightmost area D.

As shown in (b) of FIG. 18, the horizontal dot area HDA and/or thevertical dot area VDA may not be divided into a plurality of areas.Namely, the dots DT, of which the attributes gradually change, may bedisposed. For example, a size and/or a density of the dot DT mayincrease as the dot DT goes to the upper side of the horizontal dot areaHDA and/or the vertical dot area VDA. The size and/or the density of thedot DT may decrease as the dot DT goes to the inner side of thehorizontal dot area HDA and/or the vertical dot area VDA.

As shown in (c) of FIG. 18, attributes of dots DT in an inner area andan outer area of the horizontal dot area HDA and/or the vertical dotarea VDA may change. For example, a dot DT having a relatively smallsize may be disposed at a boundary between the left and right sidesand/or the lower side of the horizontal dot area HDA and/or the verticaldot area VDA. A dot DT having a relatively large size may be disposed ata boundary between the inner side and/or the upper side of thehorizontal dot area HDA and/or the vertical dot area VDA.

The attribute of the dot DT including the size may change gradually ornon-gradually. For example, in an area ranging from the outer area tothe inner area of the horizontal dot area HDA and/or the vertical dotarea VDA, the size of the dot DT may gradually change or may changedepending on a location. For example, the size of the dot DT in a firstarea including the left and right sides of the horizontal dot area HDAand/or the vertical dot area VDA may be different from the size of thedot DT in a second area including the inner side of the horizontal dotarea HDA and/or the vertical dot area VDA. In other words, there may bea difference in at least one of the size, the color, the interval, andthe density of the dots DT disposed in a horizontal direction and/or avertical direction of the horizontal dot area HDA and/or the verticaldot area VDA. For example, in the instance of the horizontal dot areaHDA, sizes of two dots DT positioned adjacent to each other in thehorizontal direction of the horizontal dot area HDA may be differentfrom each other. The arrangement of the dots DT may be related to thelens hole positioned along the horizontal direction of the horizontaldot area HDA. Namely, a portion, in which the lens hole is positioned,may be brighter, and other areas may be darker. The dots DT havingdifferent attributes may be arranged along the horizontal direction ofthe horizontal dot area HDA, so as to prevent a luminance difference, inwhich a brighter portion and a darker portion are present.

As shown in FIG. 19, dots constituting the horizontal dot area HDA andthe vertical dot area VDA may have different attributes. For example, asize range of the dots constituting the horizontal dot area HDA may begreater than a size range of the dots constituting the vertical dot areaVDA. Namely, the horizontal dot area HDA may include relatively smallerdots and relatively larger dots than the vertical dot area VDA. In otherwords, a diversity of the dots constituting the horizontal dot area HDAmay be more than a diversity of the dots constituting the vertical dotarea VDA. For example, the smallest dot in the horizontal dot area HDAmay be smaller than the smallest dot in the vertical dot area VDA, andthe largest dot in the horizontal dot area HDA may be larger than thelargest dot in the vertical dot area VDA. For example, the smallest dotof the horizontal dot area HDA may have the size equal to or less than0.5 mm, and the largest dot of the horizontal dot area HDA may have thesize equal to or greater than 2 mm. On the other hand, the smallest dotof the vertical dot area VDA may have the size equal to or less than 0.8mm, and the largest dot of the vertical dot area VDA may have the sizeequal to or greater than 1.2 mm. For example, when the sizes of the dotsincluded in the horizontal dot area HDA are divided into “A” groups andthe sizes of the dots included in the vertical dot area VDA are dividedinto “B” groups, A is greater than B. In other words, a size diversityof the dots included in the horizontal dot area HDA may be more than asize diversity of the dots included in the vertical dot area VDA.

An amount range of the dots constituting the horizontal dot area HDA maybe greater than an amount range of the dots constituting the verticaldot area VDA. For example, when the dots having the same size are used,a number of dots included in the horizontal dot area HDA may be more orless than a number of dots included in the vertical dot area VDA.

As shown in FIG. 20, the dot area DA may exist on the reflecting sheet126. For example, the dots may be distributed along the short sides ofthe display device 100. For example, the dots may be distributed in thesecond area 126 b (refer to FIG. 13) of the reflecting sheet 126. Asdescribed above, the dot area DA may include a horizontal dot area HDAand a vertical dot area VDA. A description of one of the horizontal dotarea HDA and the vertical dot area VDA is equally applied to the other,except in the instance where the horizontal dot area HDA and thevertical dot area VDA are separately described.

The arrangement of the dots DT in the dot area DA may be related to thearrangement of the lens holes 235. As described above, the lens hole 235may correspond to the light source 203 (refer to FIG. 10) and the lens124 b (refer to FIG. 10).

The plurality of lens holes 235 may be disposed on the reflecting sheet126 in accordance with a predetermined rule. Some of the plurality oflens holes 235 may be disposed adjacent to the dot area DA. For example,the lens holes 235 may be separated from the dot area DA by apredetermined distance and may be disposed in parallel with each other.

A first area AR1 and a second area AR2 may be formed based on the lensholes 235. For example, the first area AR1 may be an area including thelens hole 235, and the second area AR2 may be an area between the lensholes 235.

The dots DT disposed in the first area AR1 and the second area AR2 mayhave different attributes. For example, at least one of a size, adensity, and a color of the dot DT in the first area AR1 may bedifferent from at least one of a size, a density, and a color of the dotthe second area AR2. The difference is because intensities of lightbeams reaching the first area AR1 and the second area AR2 may bedifferent from each other depending on a distance between the lens hole235 and the first area AR1 and the second area AR2.

As shown in FIG. 21A, attributes of the dots DT constituting thehorizontal dot area HDA and/or the vertical dot area VDA may changedepending on the area.

The horizontal dot area HDA may include first to third horizontal dotareas HDA1 to HDA3. Namely, the dot area DA may be divided into aplurality of areas. The first horizontal dot area HDA1 may be an areaincluding both sides of the horizontal dot area HDA and may be aboundary area in an inside direction of the reflecting sheet 126. Thesecond horizontal dot area HDA2 may be an area inside the firsthorizontal dot area HDA1, and the third horizontal dot area HDA3 may bean area inside the second horizontal dot area HDA2.

The dots DT in the first to third horizontal dot areas HDA1 to HDA3 mayhave different attributes. Namely, there may be a difference between thedots DT of the first to third horizontal dot areas HDA1 to HDA3 in atleast one of a size, a density, and a color of the dot DT. For example,the dots DT included in the first horizontal dot area HDA1 may be thesame as one another in at least one of the size, the distance, thedensity, and the color. However, the dot DT of the first horizontal dotarea HDA1 may be different from the dot DT of the second horizontal dotarea HDA2 in at least one of the size, the distance, the density, andthe color. Considering the above description, each of the first to thirdhorizontal dot areas HDA1 to HDA3 may be regarded as the gathering (orarranging) of the dots DT having the same attribute.

The vertical dot area VDA may include first to third vertical dot areasVDA1 to VDA3. The dots DT constituting the first to third vertical dotareas VDA1 to VDA3 may have different attributes. The above descriptionof the first to third horizontal dot areas HDA1 to HDA3 of thehorizontal dot area HDA may be equally applied to the first to thirdvertical dot areas VDA1 to VDA3 of the vertical dot area VDA.

The horizontal dot area HDA and the vertical dot area VDA may beadjacent to four corner areas of the reflecting sheet 126. For example,the horizontal dot area HDA may be disposed on one side of a cuttingportion S1, and the vertical dot area VDA may be disposed on the otherside of the cutting portion S1. The first horizontal dot area HDA1 andthe first vertical dot area VDA1 may be positioned in an area includingthe corner area close to the horizontal dot area HDA and the verticaldot area VDA

Because the corner area is relatively far away from the lens hole 235,the corner area may be relatively dark. Thus, the dot DT may not bedisposed in the middle of the corner area. The dots DT having arelatively high reflectance may be disposed in the first horizontal dotarea HDA1 and the first vertical dot area VDA1 close to the corner area.For example, the relatively small dots DT may be disposed. For example,the dots DT having the relatively low density may be disposed.

As shown in FIG. 21B, the plurality of lens holes 235 may be dividedinto a first lens hole group 235 a and a second lens hole group 235 bdepending on a distance between the lens holes 235 and the dot area DA.For example, the first lens hole group 235 a may include the lens holes235 adjacent to the dot area DA, and the second lens hole group 235 bmay include the lens holes 235 in the rear of the first lens hole group235 a.

A portion of light emitted from the second lens hole group 235 b may beshielded by the first lens hole group 235 a. For example, a shieldingarea LH may be formed. The brightness of a corresponding area may beless than the brightness of other area because of the shielding area LH.Thus, the dots DT of the shielding area LH and the dots DT of other areamay be differently configured. For example, a size of the dot DT in atleast a portion of the shielding area LH may be different from that inthe other area.

As shown in FIG. 22, a shape of the dot area DA may be changed dependingon a location of the lens hole 235. For example, the dot area DA mayinclude a first area AR1 including the lens hole 235 and a second areaAR2 except the first area AR1 from the dot area DA. The first area AR1may protrude to the lens hole 235 further than the second area AR2. Forexample, a protrusion area PD may be added to the dot area DA. Aluminance of an area close to the lens hole 235 may be reduced by theprotrusion area PD. The dots DT constituting the protrusion area PD maybe different from the dots DT of other area.

As shown in FIG. 23A, the shape of the dot area DA may be changeddepending on a relative location between the dot area DA and the lenshole 235. For example, as described above, the first area AR1corresponding to the lens hole 235 may include the protrusion area PDprotruding to the lens hole 235.

A first dot DT1 constituting the protrusion area PD may be differentfrom a second dot DT2 in the rear of the first dot DT1.

A shape of the horizontal dot area HDA may be different from a shape ofthe vertical dot area VDA. For example, the protrusion area PD may beincluded only in one of the horizontal dot area HDA and the vertical dotarea VDA. This may be related to the fact that a number of lens holes235 in the horizontal dot area HDA is more than a number of lens holes235 in the vertical dot area VDA.

As shown in FIG. 23B, each of the horizontal dot area HDA and thevertical dot area VDA disposed on the reflecting sheet 126 may have aspecific shape. For example, a height and/or a width of the horizontaldot area HDA and/or the vertical dot area VDA may be differently setdepending on a location.

The horizontal dot area HDA may be divided. For example, the horizontaldot area HDA may be divided into first to third horizontal areas HA1 toHA3. The second horizontal area HA2 may be a center area of thehorizontal dot area HDA. The first and third horizontal areas HA1 andHA3 may correspond to both sides of the second horizontal area HA2.

The first and third horizontal areas HA1 and HA3 may have a shapedifferent from the second horizontal area HA2. For example, the firstand third horizontal areas HA1 and HA3 may have a shape protruding tothe inside of the reflecting sheet 126 further than the secondhorizontal area HA2. For example, the second horizontal area HA2 mayhave a fourth height H4. The fourth height H4 may be less than at leastone of first to third heights H1 to H3. The shape difference may bebecause the first and third horizontal areas HA1 and HA3 are closer tothe corner of the reflecting sheet 126 than the second horizontal areaHA2. Namely, because the reflecting sheet 126 has the rounded shape inthe horizontal and vertical directions at the corner of the reflectingsheet 126, the luminance needs to be more precisely controlled.

In the first and third horizontal areas HA1 and HA3, the horizontal dotarea HDA may have the shape protruding in a predetermined pattern alongthe inside direction of the reflecting sheet 126. For example, thehorizontal dot area HDA may have the shape protruding by the firstheight H1 and the second height H2 and then protruding by the thirdheight H3. The first and third heights H1 and H3 may be greater than thesecond height H2. The first and third heights H1 and H3 may be differentfrom each other. For example, the first heights H1 may be greater thanthe third height H3. The horizontal dot area HDA of the first height H1and the horizontal dot area HDA of the third height H3 may be formedbetween the lens holes 235. For example, the horizontal dot area HDA ofthe first and third heights H1 and H3 may be formed in first and secondareas A1 and A2 between the lens holes 235. Because light beams emittedfrom the plurality of lens holes 235 overlap each other through theabove-described shape of the horizontal dot area HDA, the brightness ofthe first and second areas A1 and A2 may be efficiently controlled.

FIG. 23B shows that the horizontal dot area HDA has the first to fourthheights H1 to H4, as an example. The vertical dot area VDA having theheight/the width different from the horizontal dot area HDA may beconfigured, so as to achieve the same or similar configuration andeffect.

FIGS. 24 and 25 illustrate the reflecting sheet according to theembodiment of the invention.

As shown in FIGS. 24 and 25, the reflecting sheet 126 according to theembodiment of the invention may include the dot area DA.

The dot area DA may be formed along the long side and/or the short sideof the reflecting sheet 126. Namely, the dot area DA may be formed inthe corner area of the reflecting sheet 126. In other words, the dotarea DA may be formed in the second sheet area 126 b(refer to FIG. 11)of the reflecting sheet 126 placed in the receiving unit 132 (refer toFIG. 10) of the frame 130 (refer to FIG. 10). The dot area DA mayinclude first and second horizontal dot areas HDA1 and HDA2 and firstand second vertical dot areas VDA1 and VDA2. The first and secondhorizontal dot areas HDA1 and HDA2 are represented as the horizontal dotarea HDA, and the first and second vertical dot areas VDA1 and VDA2 arerepresented as the vertical dot area VDA, except in the instance wherethey need to be distinguished from each other.

A shape of the horizontal dot area HDA may be different from a shape ofthe vertical dot area VDA. For example, the shape of the horizontal dotarea HDA may not be symmetric to the shape of the vertical dot area VDAbased on a cutting portion S1 positioned at the corner of the reflectingsheet 126.

The reflecting sheet 126 may include lens holes 235 for coupling thelenses 124 b (refer to FIG. 11), fixing pin holes 206, supporter holes205, a horizontal coupling unit HH, and a vertical coupling unit VH.

The lens holes 235 may be disposed in parallel with one another alongthe horizontal and vertical directions based on the size of the displaydevice 100.

The fixing pin hole 206 may be coupled to the fixing pin 202 (refer toFIG. 10) for fixing the reflecting sheet 126 to the frame 130 (refer toFIG. 10). The fixing pin hole 206 may be positioned adjacent to theoutermost lens hole 235. For example, the fixing pin hole 206 may bepositioned between the adjacent lens holes 235 or between the lens hole235 and the dot area DA.

The fixing pin hole 206 may be positioned adjacent to the lens hole 235disposed on the outermost side. For example, the fixing pin hole 206 maybe positioned closer to the outermost side than the outermost lens hole235. For example, the fixing pin hole 206 may be positioned at alocation overlapping the outermost lens hole 235.

When the fixing pin 202 (refer to FIG. 10) is coupled to the frame 130(refer to FIG. 10) through the fixing pin hole 206, the second sheetarea 126 b may be naturally formed. Namely, when the fixing pin 202(refer to FIG. 10) is coupled to the frame 130 (refer to FIG. 10)through the fixing pin hole 206 formed in the horizontal and verticaldirections, a round chamfer may be formed in the outer area of thereflecting sheet 126.

A distance between the fixing pin holes 206 may be differently set. Forexample, a number of fixing pin holes 206 positioned in a horizontalcenter area HCA may be more than a number of fixing pin holes 206positioned in other areas based on the horizontal direction of thereflecting sheet 126.

A distance between the fixing pin holes 206 positioned in the horizontalcenter area HCA may be called a first horizontal distance HD1, and adistance between the fixing pin holes 206 positioned in areas other thanthe horizontal center area HCA may be called a second horizontaldistance HD2. The first horizontal distance HD1 may be less than thesecond horizontal distance HD2. Namely, the fixing pin holes 206 in thehorizontal center area HCA may be more densely disposed. Thus, a roundchamfer may be naturally formed at the four upper, lower, left, andright corners of the reflecting sheet 126 while the reflecting sheet 126is efficiently fixed.

The fixing pin holes 206 disposed in the vertical direction may exist.For example, the fixing pin holes 206 may be disposed along the left andright short sides of the reflecting sheet 126.

The fixing pin holes 206 on the first short side SS1 may be disposed atpredetermined intervals of a first vertical distance VD1. The fixing pinholes 206 on the second short side SS2 may be disposed at predeterminedintervals of a second vertical distance VD2. The first vertical distanceVD1 and the second vertical distance VD2 may be different from eachother. The second vertical distance VD2 may be greater than the firstvertical distance VD1.

A difference between the first vertical distance VD1 and the secondvertical distance VD2 may be generated by a shape of the frame 130coupled to the reflecting sheet 126. For example, the difference betweenthe first vertical distance VD1 and the second vertical distance VD2 maybe generated by a coupling space of a rib for assisting rigidity of theframe 130 and/or various electronic parts coupled to the frame 130. Thesupporter holes 205 may be coupled to the supporters 200. The supporterholes 205 may support the diffusion plate 129 (refer to FIG. 5) and/orthe optical sheet 125 (refer to FIG. 5) on the reflecting sheet 126. Thesupporter holes 205 may be positioned in the middle of the reflectingsheet 126 for the efficient support. Namely, the supporter hole 205 maybe positioned further inside than the outermost lens hole 235.

The horizontal coupling unit HH and the vertical coupling unit VH may bedisposed along the corner area of the reflecting sheet 126. Thehorizontal coupling unit HH and the vertical coupling unit VH may beinserted into the protrusions of the frame 130 (refer to FIG. 10).

FIG. 25 shows one edge area of the reflecting sheet 126.

Outermost lens holes 235 a to 235 c may mean the lens hole 235positioned on the outermost side. Among the outermost lens holes 235 ato 235 c, the first and second outermost lens holes 235 a and 235 bpositioned on the upper side may be separated from the lower side of thehorizontal dot area HDA by a first distance HDS and may be separatedfrom the upper side of the horizontal dot area HDA by a second distanceHDE. Among the outermost lens holes 235 a to 235 c, the first and thirdlens holes 235 a and 235 c positioned on the side may be separated fromthe lower side of the vertical dot area VDA by a third distance VDS andmay be separated from the upper side of the vertical dot area VDA by afourth distance VDE.

The first distance HDS may be different from the third distance VDS, andthe second distance HDE may be different from the fourth distance VDE.This means that a width, a length, etc., of the horizontal dot area HDAmay be different from a width, a length, etc., of the vertical dot areaVDA.

The first distance HDS may be greater than the third distance VDS.Namely, a distance between the horizontal dot area HDA and the lens hole235 is greater than a distance between the vertical dot area VDA and thelens hole 235.

The second sheet area 126 b (refer to FIG. 11) corresponding to thehorizontal dot area HDA may be shorter than the second sheet area 126 b(refer to FIG. 11) corresponding to the vertical dot area VDA. Becauselengths of the long side and the short side of the second sheet area 126b are different from each other, a slope of the round chamfer of thevertical dot area VDA on the short side may be greater than a slope ofthe round chamfer of the horizontal dot area HDA on the long side. Anincrease in the slope may increase a reflectance. When the reflectanceincreases, a corresponding portion may look brighter. In the reflectingsheet 126 according to the embodiment of the invention, because thevertical dot area VDA is positioned closer to the lens hole 235 than thehorizontal dot area HDA, the reflectance may be controlled in spite ofthe high slope of the vertical dot area VDA on the short side of thereflecting sheet 126.

The non-dot area NDA may be positioned between the horizontal/verticaldot area HDA or VDA and a horizontal/vertical margin area HM or VM.Namely, the non-dot area NDA not including the dot DT may be positionedon the horizontal/vertical dot area HDA or VDA, so that the userwatching the display device 100 cannot recognize the dots DT. Thenon-dot area NDA is formed considering that the dots DT may berecognized from the outside when the dots DT exist in a correspondingarea.

The horizontal and vertical margin areas HM and VM may correspond to thethird sheet area 126 c. Namely, the horizontal and vertical margin areasHM and VM may be an outermost area of the reflecting sheet 126. In otherwords, the horizontal and vertical margin areas HM and VM may be an areaof the reflecting sheet 126 contacting the third frame area 130 c of theframe 130 (refer to FIG. 11). The dots DT may not exist in thehorizontal/vertical margin area HM or VM.

A gap CR may exist between the horizontal margin area HM and thevertical margin area VM. The reflecting sheet 126 may be a plane.Namely, the reflecting sheet 126 may be a two-dimensional plane. Whenthe reflecting sheet 126 of the two-dimensional shape is coupled to thereceiving unit 132 (refer to FIG. 10) of the three-dimensional shape,the reflecting sheet 126 may be changed into the three-dimensionalshape. The shape of the reflecting sheet 126 may be changed byoverlapping at least a portion of the reflecting sheet 126 along thecutting portion S1. A shadow may be generated by the overlap of thereflecting sheet 126. The gap CR may prevent the overlap of thereflecting sheet 126 and thus suppress the generation of the shadow.

A folded portion S2 may extend from an end of the cutting portion S1.The folded portion S2 may not be cut, unlike the cutting portion S1. Thefolded portion S2 may be formed by previously folding a correspondingarea along the cutting portion S1. Thus, when the reflecting sheet 126is changed into the three-dimensional shape in the receiving unit 132(refer to FIG. 10), the reflecting sheet 126 may be guided by the foldedportion S2 and may be changed into a previously designed shape.

FIGS. 26 to 28 illustrate configuration of the cutting portion of thereflecting sheet according to the embodiment of the invention.

As shown in FIGS. 26 to 28, the reflecting sheet 126 according to theembodiment of the invention may be naturally changed into thethree-dimensional shape by the cutting portion S1.

As shown in (a) of FIG. 26, the reflecting sheet 126 may have originallythe two-dimensional shape. Namely, the reflecting sheet 126 may beconfigured as a thin sheet. The thin sheet may be processed into theshape of the reflecting sheet 126. A cutting surface CA may be formed onthe reflecting sheet 126.

The cutting surface CA may be a triangular surface. For example, thetriangular cutting surface CA may exist at each corner of the reflectingsheet 126. Namely, the cutting surface CA may be positioned between thelong side LS and the short side SS of the reflecting sheet 126. Thefolded portion S2 may be provided in an end portion of the cuttingsurface CA.

The reflecting sheet 126 having the cutting surface CA may be folded ina direction, in which both sides of the triangular cutting surface CAapproach each other. The reflecting sheet 126 may be naturally folded bythe folded portion S2.

As shown in (b) of FIG. 26, the cutting portion S1 may be formed as bothsides of the triangular cutting surface CA approach each other. Thefolded portion S2 may be formed at an end of the cutting portion S1. Thereflecting sheet 126 may be naturally changed into the three-dimensionalshape by the cutting portion S1 and the folded portion S2. The cuttingportion S1 may be formed at a vertex of the reflecting sheet 126 in adiagonal direction.

As shown in FIG. 27A, the cutting surface CA may be positioned on thelong side LS of the reflecting sheet 126. This is different from theabove description, in which the cutting surface CA is positioned betweenthe long side LS and the short side SS of the reflecting sheet 126. Thehorizontal dot area HDA positioned on the long side LS may be regardedas being divided into a first horizontal dot area HDA1 and a secondhorizontal dot area HDA2 because of the cutting surface CA on the longside LS.

When the reflecting sheet 126 is placed on the frame 130 (refer to FIG.10), both sides of the triangular cutting surface CA may naturallyapproach each other. When both sides of the triangular cutting surfaceCA approach each other, the reflecting sheet 126 may be naturallychanged into the three-dimensional shape. Thus, a separate process forforming the chamfer may not be necessary. In other words, workabilitymay be improved.

The gap CR may be formed so that a first horizontal margin area HM1 anda second horizontal margin area HM2 do not overlap each other. Namely,when both sides of the triangular cutting surface CA approach eachother, the first and second horizontal margin areas HM1 and HM2 may notoverlap each other by the gap CR even if a portion of the reflectingsheet 126 overlaps. Thus, even when the guide panel GP (refer to FIG.10) is coupled on the horizontal margin area HM, a floating problemresulting from the overlap of the horizontal margin area HM can beprevented.

When both sides of the triangular cutting surface CA approach eachother, the first and second horizontal margin areas HM1 and HM2 may beclose to each other within the range where they do not overlap eachother. Thus, the gap CR may be observed as being very small in thereflecting sheet 126 placed on the frame 130 (refer to FIG. 10).

As shown in (a) of FIG. 27B, a first gap CR1 may exist in the reflectingsheet 126 of the two-dimensional shape. The reflecting sheet 126 of thetwo-dimensional shape may indicate the reflecting sheet 126 before beingcoupled to the frame 130 (refer to FIG. 10). In this instance, thesecond horizontal margin area HM2 may not be parallel. Namely, a slopearea IA may be formed in at least a portion of the second horizontalmargin area HM2. The slope area IA may be inclined downwardly by aninclined distance IM.

As shown in (b) of FIG. 27B, when the reflecting sheet 126 is placed onthe frame 130 (refer to FIG. 10), a portion of the reflecting sheet 126may overlap. For example, a portion of the first horizontal margin areaHM1 may be overlappingly positioned under the second horizontal marginarea HM2 based on the cutting portion S1.

When the reflecting sheet 126 is changed into the three-dimensionalshape by overlapping a portion of the reflecting sheet 126, the slopearea IA may rotate counterclockwise by the inclined distance IM. Hence,the first and second horizontal margin areas HM1 and HM2 may bepositioned on the same line T. A second gap CR2 of the reflecting sheet126 changed into the three-dimensional shape may be smaller than thefirst gap CR1 of the reflecting sheet 126 of the two-dimensional shape.The second gap CR2 may be very small and may be similar to a width ofthe cutting portion S1. Even if portions of the reflecting sheet 126overlap each other based on the cutting portion S1, the first and secondhorizontal margin areas HM1 and HM2 may not overlap each other.

The cutting portion S1 may have the shape extending downwardly from thelong side LS due to a location of the cutting surface CA. The shape ofthe cutting portion S1 may be advantageous in causing light to reach theend of the reflecting sheet 126. When the cutting surface CA is changedinto the shape of the cutting portion S1, the first and secondhorizontal margin areas HM1 and HM2 may form one horizontal dot areaHDA.

FIG. 27C shows the reflecting sheet 126 placed in the third frame area130 c of the frame 130 (refer to FIG. 10) when viewed from the side.Even if an overlap area OA is generated in a portion of the reflectingsheet 126, the first and second horizontal margin areas HM1 and HM2 maynot overlap each other. Thus, even if the guide panel GP is coupled onthe first and second horizontal margin areas HM1 and HM2, it may beprevented from an arm portion from being formed due to the overlap ofthe first and second horizontal margin areas HM1 and HM2.

As shown in (a) of FIG. 28, the cutting portion S1 may start from theshort side SS. The gap CR may exist at a starting position of thecutting portion S1.

As shown in (b) of FIG. 28, even when the cutting portion S1 exists onthe short side SS and/or the long side LS, the folded portion S2 may beformed. The folded portion S2 may be formed in the diagonal direction,unlike the cutting portion S1. Thus, the folded portion S2 may guide thefolding of the reflecting sheet 126.

FIGS. 29 and 30 illustrate a dot area according to the embodiment of theinvention.

As shown in FIGS. 29 and 30, the dot area DA according to the embodimentof the invention may have various shapes so as to optimally reflectlight.

As shown in (a) of FIG. 29, the horizontal dot area HDA and the verticaldot area VDA may have different shapes. For example, the horizontal dotarea HDA may be separated from the cutting portion S1 and/or the foldedportion S2 by a first angle DA1, and the vertical dot area VDA may beseparated from the cutting portion S1 and/or the folded portion S2 by asecond angle DA2. The first angle DA1 may be different from the secondangle DA2. For example, the first angle DA1 may be greater than thesecond angle DA2.

A difference between the location and/or the shape of the horizontal dotarea HDA and the location and/or the shape of the vertical dot area VDAmay be related to an amount of incident light. For example, the lenscoupled to the second lens hole 235 b may shield light emitted fromother lens. Namely, a shade area GA may be formed by the lens coupled tothe second lens hole 235 b. Thus, the horizontal dot area HDA may beseparated from the cutting portion S1 and/or the folded portion S2 bythe first angle DA1, so that the horizontal dot area HDA does notoverlap the shade area GA. Also, the location and/or the width of thevertical dot area VDA may be determined in consideration of the shadebetween the lens holes 235.

The cutting portion S1 and/or the folded portion S2 may be a directiontoward a center point CH of the first lens hole 235 a. Namely, thecutting portion S1 and/or the folded portion S2 may be positioned on animaginary extension line HDR connecting the center point CH to thecutting portion S1 and/or the folded portion S2 and may be positioned onthe line parallel to and/or the same line as the cutting portion S1and/or the folded portion S2. Thus, light emitted from the lens 124 b(refer to FIG. 11) coupled to the first lens hole 235 a may beefficiently transferred up to end of the corner area of the reflectingsheet 126.

As shown in (b) of FIG. 29, the first and second angles DA1 and DA2between the cutting portion S1 and/or the folded portion S2 and thehorizontal dot area HDA and the vertical dot area VDA may be the same aseach other. For example, when the shade is not generated or slightlygenerated by the size of the display device 100 and/or the location ofthe lens hole 235, the first and second angles DA1 and DA2 may besubstantially equally configured.

As shown in FIG. 30, the first and second angles DA1 and DA2 may beasymmetric. The shape of the horizontal dot area HDA at the first angleDA1 may be different from the shape of the vertical dot area VDA at thesecond angle DA2. As described above, the shape of the horizontal dotarea HDA and/or the vertical dot area VDA may be determined depending onthe generation of the shade based on the disposition of the lens hole235 and the lens 124 b (refer to FIG. 11) coupled to the lens hole 235.

The horizontal dot area HDA and/or the vertical dot area VDA may have abending shape. For example, a distance between the horizontal dot areaHDA and the cutting portion S1 and a distance between the vertical dotarea VDA and the cutting portion S1 may be changed.

FIGS. 31 to 38 illustrate configuration related to the lens hole of thereflecting sheet according to the embodiment of the invention.

As shown in FIGS. 31 to 38, the reflecting sheet 126 according to theembodiment of the invention may include the lens hole 235 of variousshapes and/or various dispositions capable of controlling a reflectionamount of light.

As shown in FIG. 31, at least one of the lens holes 235 may include afirst lens hole 235 a.

The first lens hole 235 a may not have a circular shape (or a perfectlycircular shape). The first lens hole 235 a may have a shape, in which aradius is changed. The first lens hole 235 a may have a shape, in whicha radius is successively changed. For example, the first lens hole 235 aof an oval shape may be used. The first lens hole 235 a may have ashape, in which a radius is non-successively changed. For example, thefirst lens hole 235 a may have a combination shape of a circle of afirst radius R1 and a circle of a second radius R2. The second radius R2may be an area corresponding to an angle AA. The angle AA may be lessthan 180 degrees. Namely, the area corresponding to the angle AA mayhave a fan shape of the second radius R2. In other words, a width of thearea corresponding to the angle AA may be less than widths of otherareas.

As described above, the second radius R2 may be greater than the firstradius R1. Thus, a portion of light emitted through the first lens hole235 a may be emitted from the area corresponding to the angle AA to therear of the reflecting sheet 126. A total amount of light reflected ontothe front of the reflecting sheet 126 by the reflecting sheet 126 maydecrease by an amount of light emitted to the rear of the reflectingsheet 126.

An area corresponding to the second radius R2 of the first lens hole 235a may face a chamber area CSA. Namely, the area corresponding to thesecond radius R2 of the first lens hole 235 a may face an outerperipheral of the reflecting sheet 126. In other words, the areacorresponding to the second radius R2 of the first lens hole 235 a mayface the second sheet area 126 b (refer to FIG. 13). As described above,because a portion of light is emitted to the rear of the reflectingsheet 126 by the second radius R2, an influence of the first lens hole235 a on the chamber area CSA may be less than an influence of thegeneral lens hole 235. Thus, the chamber area CSA may be prevented frombeing brighter than other area.

As shown in FIG. 32, the lens hole 235 may include a first lens hole 235a, of which a radius is changed, and a circular second lens hole 235 b.

The first lens hole 235 a may be positioned on the upper, left, right,and lower sides of the disposed lens holes 235. As described above, thedisposition of the first lens hole 235 a may prevent the upper, left,right, and lower sides of the lens hole 235 from being brighter thanother area.

As shown in FIG. 33, the dot area DA may be formed in various shapes.Namely, the dot area DA of the various shapes may be configured so thatthe reflecting sheet 126 uniformly reflects light. For example, the dotarea DA may be formed around the lens hole 235. For example, the dotarea DA may be formed in at least a partial area around the lens hole235. For example, the dot area DA may have the shape surrounding thelens hole 235. Namely, a first circular dot area CDT1 may be formed.

The first ring-shaped dot area CDT1 may have the shape surrounding thelens hole 235. For example, the first ring-shaped dot area CDT1 may havethe shape, in which the dots DT of the same size and/or the same shapesurround the lens hole 235. For example, the first ring-shaped dot areaCDT1 may have the shape, in which the dots DT, of which at least apartial size and/or shape is different, surround the lens hole 235.

A reflectance of a corresponding area may be changed by the firstring-shaped dot area CDT1. For example, a reflectance of a formationarea of the first ring-shaped dot area CDT1 may be reduced. Thus, thefirst ring-shaped dot area CDT1 may be formed around a specific lenshole 235, which needs to reduce the reflectance.

The horizontal dot area HDA and/or the vertical dot area VDA may includea plurality of areas, in which attributes of the dots are different fromone another. For example, the horizontal dot area HDA may include firstto third horizontal dot areas HDA1 to HDA3, and the vertical dot areaVDA may include first to third vertical dot areas VDA1 to VDA3. Theremay be a difference between the dots of the areas in at least one of asize, an interval, a density, and a color of the dot. For example, thesize of the dot in the first horizontal dot area HDA1 may be less thanthe size of the dot in the second horizontal dot area HDA2, and the sizeof the dot in the second horizontal dot area HDA2 may be less than thesize of the dot in the third horizontal dot area HDA3, or vice versa.The configuration of the first to third horizontal dot areas HDA1 toHDA3 may be equally applied to the first to third vertical dot areasVDA1 to VDA3.

As shown in FIG. 34, the reflecting sheet 126 may include a plurality oflens holes 235. The first ring-shaped dot area CDT1 may be formed in aspecific lens hole 235 among the plurality of lens holes 235. Forexample, the plurality of lens holes 235 may include a first lens hole235 a, in which the first ring-shaped dot area CDT1 is formed, and asecond lens hole 235 b, in which the first ring-shaped dot area CDT1 isnot formed. The first lens hole 235 a having the first ring-shaped dotarea CDT1 may be the lens hole 235 positioned on the outside among theplurality of lens holes 235 a. Namely, the first ring-shaped dot areaCDT1 may be formed in the outermost lens hole 235. This may be becausethe first lens hole 235 a positioned on the outside is close to thebending second sheet area 126 b (refer to FIG. 13) of the reflectingsheet 126. Namely, the first ring-shaped dot area CDT1 may be formed inthe first lens hole 235 a, so as to prevent an excessively large amountof light from being reflected from the second sheet area 126 b.

As shown in (a) of FIG. 35A, a first ring-shaped dot area CDT1 may beformed around the lens hole 235. The first ring-shaped dot area CDT1 maybe dots DT surrounding the lens hole 235. The first ring-shaped dot areaCDT1 may be dots DT surrounding the lens hole 235 one time. The dots DTconstituting the first ring-shaped dot area CDT1 may have the same sizeand/or the same shape. Alternatively, at least a portion of the dots DTconstituting the first ring-shaped dot area CDT1 may have differentsizes and different shapes. For example, a size of the dot DT positionedin the outside direction of the reflecting sheet 126 may be greater thana size of the dot DT positioned in the inside direction of thereflecting sheet 126.

As shown in (b) of FIG. 35A, a second ring-shaped dot area CDT2 may beformed around the lens hole 235. The second ring-shaped dot area CDT2may be dots DT surrounding the lens hole 235 several times (severalloops or nested). This is a difference between the first ring-shaped dotarea CDT1 surrounding the lens hole 235 one time and the secondring-shaped dot area CDT2.

As shown in (c) of FIG. 35A, a third ring-shaped dot area CDT3 may beformed around the lens hole 235. The third ring-shaped dot area CDT3 maybe formed around a predetermined portion of the lens hole 235. Forexample, the third ring-shaped dot area CDT3 may be formed in a portioncorresponding to an angle AC in the lens hole 235. The third ring-shapeddot area CDT3 may surround the portion corresponding to the angle AC onetime or several times.

As shown in (d) of FIG. 35A, a fourth ring-shaped dot area CDT4 may beformed around the lens hole 235. A density of dots of the fourthring-shaped dot area CDT4 may vary depending on a location. For example,the dots may have the same size, but a distance between the dots may bechanged. For example, a distance between the dots positioned close tothe lens hole 235 may be relatively short, and a distance between thedots positioned far away from the lens hole 235 may be relatively long.

As shown in (a) of FIG. 35B, a fourth ring-shaped dot area CDT4 may beformed around at least a portion of the lens hole 235. The fourthring-shaped dot area CDT4 may be dots DT positioned in a portioncorresponding to an angle AC in the lens hole 235. The fourthring-shaped dot area CDT4 may be separated from the lens hole 235.Namely, the fourth ring-shaped dot area CDT4 may be formed at a locationwhich is separated from a boundary of the lens hole 235 by apredetermined distance.

As shown in (b) of FIG. 35B, a fifth ring-shaped dot area CDT5 may beformed around at least a portion of the lens hole 235. The fifthring-shaped dot area CDT5 may include a first dot area DT1 and a seconddot area DT2. An attribute of a dot constituting the first dot area DT1may be different from an attribute of a dot constituting the second dotarea DT2. For example, sizes of the dots constituting the first andsecond dot areas DT1 and DT2 may be different from each other. Forexample, a size of the dot constituting the second dot area DT2 may begreater than a size of the dot constituting the first dot area DT1. Anarea corresponding to the second dot area DT2 may be an area which canemit a larger amount of light than the lens positioned in the lens hole235. Thus, the second dot area DT2 may be formed, so as to furtherreduce a reflectance of the fifth ring-shaped dot area CDT5 than otherareas.

As shown in (c) of FIG. 35B, the lens hole 235 may be a first lens hole235 a, which is not circular. As described above, a radius of at least aportion of the first lens hole 235 a may be different from a radius ofat least another portion of the first lens hole 235 a. The first lenshole 235 a may cause a portion of light to be emitted downwardly fromthe reflecting sheet 126, thereby controlling an amount of the light.

A sixth ring-shaped dot area CDT6 may be formed in an area AC. The areaAC may be an area having a relatively large radius in the first lenshole 235 a. For example, the sixth ring-shaped dot area CDT6 may beformed in an area having a radius R2. An amount of light emitted and/orreflected in a specific direction may be efficiently controlled by thearea having the radius R2 and the sixth ring-shaped dot area CDT6.

As shown in (d) of FIG. 35B, the lens hole 235 may be a first lens hole235 a, which is not circular. A sixth ring-shaped dot area CDT6 and aseventh ring-shaped dot area CDT7 may be formed around the first lenshole 235 a. The sixth ring-shaped dot area CDT6 and the seventhring-shaped dot area CDT7 may surround the first lens hole 235 a.

As shown in FIG. 36, the lens hole 235 may include first lens holes 235a and second lens holes 235 b.

As shown in (a) of FIG. 36, the first lens hole 235 a may be a lens hole235 having a ring-shaped dot area. A location of the first lens hole 235a having the ring-shaped dot area may be different from a location ofthe second lens hole 235 b not having the ring-shaped dot area. Forexample, the first lens holes 235 a may be positioned in the inner areaof the reflecting sheet 126, and the second lens holes 235 b may bepositioned in the outer area of the reflecting sheet 126. The locationsof the first and second lens holes 235 a and 235 b may be changed.

The lens holes 235 may be arranged in the horizontal direction and/orthe vertical direction. The lens holes 235 arranged in the horizontaldirection and/or the vertical direction may be disposed in parallel withone another. Such a disposition or arrangement can achieve the commondesign and the common manufacturing process and can obtain an effectcapable of reducing the cost.

The lens holes 235 arranged in the horizontal direction and/or thevertical direction may not be disposed in parallel with one another. Forexample, the lens holes 235 may be disposed in a zigzag pattern in thevertical direction. Such a disposition or arrangement can obtain aneffect reducing a light overlap and/or a light shade between the lensholes 235.

Because the first lens hole 235 a is positioned in the inner area of thereflecting sheet 126, a luminance of the first sheet area 126 a (referto FIG. 11) of the reflecting sheet 126 may be more uniformlycontrolled. This can be clearly understood considering that lightemitted from the lens holes 235 is relatively bright around the lensholes 235 and becomes darker as it is far away from the lens holes 235.The first lens hole 235 a, in which dots are formed, may control abrightness and/or a reflectance around the lens hole 235 and mayhomogenize an entire luminance.

As shown in (b) of FIG. 36, the first lens holes 235 a may be disposedin accordance with a predetermined rule. For example, the lens holepositioned in one of the left and right directions or one of theplurality of lens holes 235 may be the first lens hole 235 a. The firstlens holes 235 a may be disposed in the zigzag pattern in the verticaldirection. Namely, the first lens holes 235 a may not be in parallelwith one another in the vertical direction. Such a disposition mayminimize a reduction in the entire brightness by the first lens hole 235a and may homogenize the luminance.

As shown in (a) of FIG. 37, a third ring-shaped dot area CDT3 may beformed in a first lens hole 235 having an overlap shape of circles eachhaving a different radius. For example, the third ring-shaped dot areaCDT3 may be formed in a circle having a large second radius R2. Forexample, the third ring-shaped dot area CDT3 may be formed in at least aportion of the circle having the second radius R2.

As shown in (b) of FIG. 37, when the shape of the first lens hole 235 ischanged, a location of the third ring-shaped dot area CDT3 may bechanged in accordance with the first lens hole 235.

As shown in FIG. 38, the plurality of lens holes 235 may include firstlens holes 235 a and second lens holes 235 b. A third ring-shaped dotarea CDT3 may be formed in the first lens hole 235 a. A radius of thefirst lens hole 235 a may be changed. The first lens hole 235 a may bepositioned on the outside of the plurality of lens holes 235. Forexample, the first lens hole 235 a may be a lens hole 235 positioned inan area close to the long side and/or the short side. For example, thefirst lens hole 235 a may be a lens hole 235 positioned adjacent to ahorizontal dot area HDA and/or a vertical dot area VDA. Namely, thethird ring-shaped dot area CDT3 may be positioned between the first lenshole 235 a and the horizontal dot area HDA and/or the vertical dot areaVDA. Thus, an excessively large amount of light may be prevented frombeing reflected from the second sheet area 126 b (refer to FIG. 11) ofthe reflecting sheet 126.

FIGS. 39 to 43 illustrate configuration related to a lens holereflecting sheet according to the embodiment of the invention.

As shown in FIGS. 39 to 43, the display device 100 according to theembodiment of the invention may further include a lens hole reflectingsheet 126 d.

As shown in FIG. 39, the lens hole reflecting sheet 126 d may beinserted into a lens hole 235 of the reflecting sheet 126. The lens holereflecting sheet 126 d may be positioned between the lens 124 b and thelight source 203. The lens 124 b may be a refractive lens or areflective lens. The refractive or reflective lens 124 b may emit lightprovided by the light source 203 at various angles. The lens holereflecting sheet 126 d may reflect light emitted downwardly from thelens 124 b to the upward side of the lens 124 b, thereby increasinglight efficiency.

As shown in FIG. 40, the lens hole reflecting sheet 126 d may include ahole 126 bh and a ring unit 126 bb.

The hole 126 bh may be positioned in the middle of the lens holereflecting sheet 126 d. The light source 203 may be inserted into thehole 126 bh.

The ring unit 126 bb may be an outer peripheral area of the hole 126 bh.The ring unit 126 bb may include at least one lens coupling unit 126 bc.For example, at least one lens leg 124 d formed on the lower side of thelens 124 b (refer to FIG. 39) may pass through the lens coupling unit126 bc.

As shown in FIG. 41, dots DT may be formed in at least a portion of thering unit 126 bb. The dots DT may be separated from one another by avertical distance vd and/or a horizontal distance hd. The verticaldistance vd and/or the horizontal may be uniform. For example, the dotsDT may be formed on the ring unit 126 bb at regular intervals. Thevertical distance vd and/or the horizontal may not be uniform. Forexample, the dots DT may be non-uniformly distributed on the ring unit126 bb.

FIG. 42 shows that the lens 124 b (refer to FIG. 39) and the lens holereflecting sheet 126 d (refer to FIG. 39) are not coupled. As shown inFIG. 42, one light source 203 may be configured as a plurality of LEDS.Namely, a plurality of LED chips may be used in one light package, andthus an intensity of light with respect to one light package mayincrease. The light source 203 may include first and second lightsources 203 a and 203 b.

The first and second light sources 203 a and 203 b may be positionedadjacent to each other. For example, the rectangular first and secondlight sources 203 a and 203 b may be positioned in parallel with eachother. The first and second light sources 203 a and 203 b may emit lighthaving a predetermined directivity. For example, each of the first andsecond light sources 203 a and 203 b may mainly emit light in a radialdirection HA of the outside direction.

As shown in (a) of FIG. 43, dots DT may be formed in a predeterminedarea of the lens hole reflecting sheet 126 d. The dots DT may have aconfiguration corresponding to radial characteristics of the first andsecond light sources 203 a and 203 b (refer to FIG. 42). For example,first and second dot areas DTA1 and DTA2 corresponding to the radialdirection HA (refer to FIG. 42) may be formed.

The first and second dot areas DTA1 and DTA2 may be dots positioned on apath of the radial direction HA (refer to FIG. 42). For example, thefirst and second dot areas DTA1 and DTA2 may be formed at apredetermined width. The first and second dot areas DTA1 and DTA2 may beseparated from each other. The second dot area DTA2 may be positionedfurther inside than the first dot area DTA1. A size of the first dotarea DTA1 may be greater than a size of the second dot area DTA2considering that light emitted from the first and second light sources203 a and 203 b(refer to FIG. 42) is radiated in a fan shape. Only oneof the first and second dot areas DTA1 and DTA2 may be formed, ifnecessary or desired.

As shown in (b) of FIG. 43, at least one of the first and second dotareas DTA1 and DTA2 may be formed in the reflecting sheet 126. Forexample, the first dot area DTA1 may be formed in the reflecting sheet126, and the second dot area DTA2 may be formed in the lens holereflecting sheet 126 d. The first dot area DTA1 formed in the reflectingsheet 126 may be advantageous to control a reflection amount of lightthan when the first dot area DTA1 is formed in the lens hole reflectingsheet 126 d having the relatively small area.

FIGS. 44 and 45 illustrate configuration related to horizontal andvertical coupling units of the reflecting sheet according to theembodiment of the invention.

As shown in FIGS. 44 and 45, the reflecting sheet 126 of the displaydevice 100 according to the embodiment of the invention may include ahorizontal coupling unit HH and a vertical coupling unit VH.

As shown in FIG. 44, the horizontal coupling unit HH and/or the verticalcoupling unit VH may be formed in a corner area of the reflecting sheet126. The horizontal coupling unit HH and/or the vertical coupling unitVH may be formed in a horizontal margin area HM and/or a vertical marginarea VM of the reflecting sheet 126. The dots DT may not be formed inthe horizontal margin area/or the vertical margin area VM.

The reflecting sheet 126 may be coupled to the frame 130 (refer to FIG.10). For example, the reflecting sheet 126 may be coupled to the frame130 in such a manner that the horizontal coupling unit HH and/or thevertical coupling unit VH are inserted into a structure of the frame130.

The reflecting sheet 126 may be modified. For example, the reflectingsheet 126 may contract or expand because of heat generated by anoperation of the display device 100.

The reflecting sheet 126 may be modified in the horizontal directionand/or the vertical direction. A modification amount of the reflectingsheet 126 in the horizontal direction may be greater than a modificationamount of the reflecting sheet 126 in the vertical direction. Namely,because the horizontal direction corresponds to the long side and thevertical direction corresponds to the short side, a total modificationamount in the horizontal direction may be greater than a totalmodification amount in the vertical direction although a modificationamount per unit distance in the horizontal direction and the verticaldirection is similar.

The horizontal coupling unit HH and/or the vertical coupling unit VH maybe configured in consideration of the coupling and/or the modificationof the reflecting sheet 126. For example, the plurality of horizontalcoupling units HH and/or the plurality of vertical coupling units VH maybe formed for the coupling of the reflecting sheet 126. For example,first to third horizontal coupling units HH1 to HH3 may be separatedfrom one another by a predetermined distance and may be formed in thehorizontal margin area HM. First and second vertical coupling units VH1and VH2 may be separated from one another by a predetermined distanceand may be formed in the vertical margin area VM.

As shown in FIG. 45, the horizontal coupling unit HH and/or the verticalcoupling unit VH may have a shape in consideration of the modificationof the reflecting sheet 126.

The horizontal coupling unit HH may be inserted into a horizontalprotrusion 130H formed in and/or coupled to the third frame area 130 cof the frame 130. A first width W1 of the horizontal coupling unit HHmay be greater than a width of the horizontal protrusion 130H. The firstwidth W1 of the horizontal coupling unit HH may be greater than a secondwidth W2 of the vertical coupling unit VH. Namely, the first width W1 ofthe reflecting sheet 126 may be greater than the width of the horizontalprotrusion 130H in consideration of the modification of the reflectingsheet 126 in the horizontal direction.

The vertical coupling unit VH may be inserted into a vertical protrusion130V formed in and/or coupled to the third frame area 130 c of the frame130. A second height H2 of the vertical coupling unit VH may be greaterthan a first height H1 of the horizontal protrusion 130H. Namely, thesecond height H2 of the vertical coupling unit VH may be relativelylarge in consideration of the modification of the reflecting sheet 126in the horizontal direction.

The vertical coupling unit VH may not include a detachment preventionunit HHU positioned on the horizontal coupling unit HH. This may bebecause the modification of the reflecting sheet 126 in the horizontaldirection is greater than the modification of the reflecting sheet 126in the vertical direction. Namely, if the vertical coupling unit VHincludes the detachment prevention unit HHU, the detachment preventionunit HHU may contact the vertical protrusion 130V in the modification ofthe horizontal direction (i.e., the X-axis direction). Hence, a wrinklemay be generated in the reflecting sheet 126.

Anon-dot area NDA may exist between horizontal and vertical dot areasHDA and VDA and horizontal and vertical margin areas HM and VM. Namely,the non-dot area NDA not including the dot may be formed in a strapshape along the horizontal and vertical directions. If the dots areformed in the non-dot area NDA, a corresponding area may be observedfrom the outside of the display device 100. Hence, the dots may not beformed in the non-dot area NDA. Further, the non-dot area NDA may serveas a buffer when the reflecting sheet 126 contracts or expands.

FIGS. 46 to 48 illustrate configuration related to a cutting portion ofthe reflecting sheet according to the embodiment of the invention.

As shown in FIGS. 46 to 48, the reflecting sheet 126 of the displaydevice 100 according to the embodiment of the invention may include acutting portion HC uniformly reflecting light.

As shown in FIG. 46, a lens hole 235 may include a first lens hole 235 aand a second lens hole 235 b.

As shown in (a) of FIG. 46, the first lens hole 235 a may be a lens hole235 including ring-shaped dots DT. A location of the first lens hole 235a including the dots DT may be different from a location of the secondlens hole 235 b not including the dot DT. For example, the first lenshole 235 a may be positioned in the inner area of the reflecting sheet126, and the second lens hole 235 b may be positioned in the outer areaof the reflecting sheet 126. The locations of the first and second lensholes 235 a and 235 b may be changed.

Because the first lens hole 235 a is positioned in the inner area of thereflecting sheet 126, an effect capable of more uniformly controlling aluminance of the first sheet area 126 a (refer to FIG. 11) of thereflecting sheet 126 may be expected. This can be clearly understoodconsidering that light emitted from the lens hole 235 is relativelybright around the lens hole 235 and becomes darker as it is far awayfrom the lens hole 235. The first lens hole 235 a, in which the dots DTare formed, may control a brightness and/or a reflectance around thelens hole 235 and may homogenizes an entire luminance.

As shown in (b) of FIG. 46, the first lens holes 235 a may be disposedin accordance with a predetermined rule. For example, the lens holepositioned in one of the left and right directions or one of theplurality of lens holes 235 may be the first lens hole 235 a. The firstlens holes 235 a may be disposed in the zigzag pattern in the verticaldirection. Namely, the first lens holes 235 a may not be in parallelwith one another in the vertical direction. Such a disposition mayminimize a reduction in the entire brightness by the first lens hole 235a and may homogenizes the luminance.

As shown in FIG. 47, the substrate 122 may have a shape, in which afirst substrate 122 a and a second substrate 122 b are connected.Namely, the substrate 122, on which the light source 203 is mounted inthe rear of the reflecting sheet 126, may be divided into a plurality ofsubstrates. A first light source 203 a may be positioned at the firstsubstrate 122 a, and a second light source 203 b may be positioned atthe second substrate 122 b. The first and second substrates 122 a and122 b may be connected through a connector CT.

The connector CT may be positioned between the first and secondsubstrates 122 a and 122 b. The connector CT may be a structureelectrically and/or physically connected to the first and secondsubstrates 122 a and 122 b. For example, the connector CT may be asoldering area.

The connector CT may protrude in the direction of the reflecting sheet126 by a distance CTH further than the substrate 122.

The cutting portion HC may correspond to the connector CT. For example,the cutting portion HC may be positioned on the connector CT.

As shown in FIG. 48A, when the reflecting sheet 126 is coupled to thesubstrate 122, cutting surfaces HCS of the cutting portion HC may beseparated from each other. Namely, a gap may be naturally generatedbetween the cutting surfaces HCS by the connector CT, which upwardlyprotrudes. When the cutting surfaces HCS are coupled to the connectorCT, a wrinkle of the reflecting sheet 126 resulting from the connectorCT may be prevented. Thus, the non-uniformity of light resulting fromthe wrinkle of the reflecting sheet 126 may be prevented.

The dots DT may be formed in the cutting surface HCS. Namely, the dotsDT may be formed in a corresponding area, so as to control an amount oflight reflected from the cutting surface HCS, which relatively upwardlyprotrudes.

As shown in FIG. 48B, the dots DT may be formed in the cutting portionHC. The dots DT may be positioned about the cutting surface HCS of thecutting portion HC. For example, the dots DT may be positioned in theleft and right cutting of the cutting portion HC. Thus, thenon-uniformity of the luminance resulting from the cutting may beminimized.

FIGS. 49 and 50 illustrate configuration related to a supporter hole ofthe reflecting sheet according to the embodiment of the invention.

As shown in FIGS. 49 and 50, the reflecting sheet 126 of the displaydevice 100 according to the embodiment of the invention may uniformlyreflect light through a dot area DTA formed around a supporter hole 205.

As shown in FIG. 49, a plurality of lens holes 235 may be formed on thereflecting sheet 126. Each of the light sources 203 coupled to theplurality of lens holes 235 may emit light.

The supporter hole 205 may be formed on the reflecting sheet 126. Asdescribed above, the supporter hole 205 may have a configuration for thecoupling of the supporter 200 (refer to FIG. 10).

The supporter hole 205 may be positioned further inside than the lenshole 235, which is positioned on the outermost side. For example, thesupporter hole 205 may be positioned between the lens holes 235.

The supporter hole 205 may be affected by the plurality of light sources203 coupled to the plurality of lens holes 235. For example, lightemitted from the plurality of light sources 203 may affect the specificsupporter hole 205 considering a light path LP with respect to thespecific supporter hole 205.

As described above, the supporter hole 205 may be coupled to thesupporter 200 (refer to FIG. 10). The supporter 200 may be formed ofplastic and/or rubber material. The supporter 200 may reflect at least aportion of light. The reflecting sheet 126 according to the embodimentof the invention may have a dot area DTA in consideration of thereflection of the supporter 200, on which light can be overlappinglyconcentrated. Namely, the dot area DTA may be formed around thesupporter hole 205, so as to reduce an influence of the supporter 200 onthe reflection of the reflecting sheet 126.

As shown in FIG. 50, the dot area DTA around the supporter hole 205 maybe formed toward an inner area EA of the reflecting sheet 126. Namely,the dot area DTA may be positioned further inside than the supporterhole 205.

The plurality of dot areas DTA around the supporter holes 205 may bepositioned opposite each other. For example, when first and secondsupporter holes 205 a and 205 b exist, first and second dot areas DTA1and DTA2 may be positioned adjacent to the first and second supporterholes 205 a and 205 b further inside than the first and second supporterholes 205 a and 205 b.

The dot area DTA around the supporter hole 205 may have a semicircularshape centering around the supporter hole 205. Namely, a center area ofthe dot area DTA, which is relatively greatly affected by the supporter200 (refer to FIG. 10), may be protrudingly configured.

FIG. 51 shows a light assembly including the light source shown in FIG.19.

As shown in FIG. 51, a plurality of light assemblies 124 according tothe embodiment of the invention may be disposed along the substrate 122and separated from one another. The light assembly 124 may include alight source 203 and a lens 300 positioned on one side of the lightsource 203.

The light source 203 may be various sources emitting light. For example,the light source 203 may be a COB type LED as described above.

The lens 300 may be positioned on the light source 203. At least apartial area of the light source 203 may overlap the lens 300. Forexample, the light source 203 may be inserted into a groove inside thelens 300. Alternatively, an area of the light source 203, from whichlight is substantially emitted, may be inserted into the lower side ofthe lens 300. For example, when the lens 300 has a leg structure, aportion of the upper side of the light source 203 may be inserted intothe lower side of the lens 300.

The lens 300 may reflect a portion of light emitted from the lightsource 203 and may refract a portion of the light. For example, the lens300 may be a refractive lens or a reflective lens. The light emittedfrom the light source 203 may be uniformly and entirely spread throughthe reflection in a portion of the lens 300 and/or the refraction in aportion of the lens 300.

The light source 203 inserted into the lens 300 may be adhered to thelens 300. For example, the lens 300 and the light source 203 may beattached to each other using an adhesive.

The lens 300 may correspond to each light source 203. For example, firstto third lenses 300 a to 300 c may be respectively positioned on firstto third light sources 203 a to 203 c.

The lens 300 may control a path of light emitted from the light source203. Namely, the lens 300 may control the light source 203 so that thelight of the light source 203 is not concentrated on a specificlocation. In other words, the lens 300 may cause the light of the lightsource 203 to be uniformly diffused. The lens 300 according to theembodiment of the invention may efficiently control the path of thelight of the light source 203. The lens 300 according to the embodimentof the invention may efficiently control light emitted from the side ofthe light source 203.

FIGS. 52 and 53 show a lens according to the embodiment of theinvention.

As shown in FIGS. 52 and 53, a lens 300 according to the embodiment ofthe invention may have a specific shape.

The lens 300 may include a first surface S1, a second surface S2opposite the first surface S1, and a third surface S3 connecting thefirst surface S1 and the second surface S2.

The first surface S1 may be an upper surface of the lens 300. At least aportion of the first surface S1 of the lens 300 according to theembodiment of the invention may be depressed. A depressed portion of thefirst surface S1 may have a shape curved from the center of the lens 300to the outside of the lens 300. For example, a first concave portion A1may be formed on the first surface S1.

An uppermost area of the first surface S1 may be a top surface TS. Thefirst surface S1 may have a circular cross-section. Light emitted fromthe upper side of the light source 203 may be upwardly emitted throughthe first surface S1 of the lens 300.

The second surface S2 may be a lower surface of the lens 300. Namely,the second surface S2 may be a surface opposite the first surface S1corresponding to the upper surface of the lens 300. At least a portionof the second surface S2 of the lens 300 according to the embodiment ofthe invention may be depressed. For example, a second concave portion A2may be formed on the second surface S2.

A radius of the second concave portion A2 on the second surface S2 maybe denoted as R2. The radius R2 of the second concave portion A2 may be1.5 to 4 times a radius of the light source 203 coupled to the lens 300.

A lowermost area of the second surface S2 may be a bottom surface BS.The second surface S2 may have a circular cross-section. The lightsource 203 may be coupled to the second surface S2. As described above,a portion of the light source 203 may be inserted into the secondsurface S2.

A radius of the second surface S2 may be “R2+R3”. A radius R1 of thefirst surface S1 may be 1 to 3 times the radius (R2+R3) of the secondsurface S2. Namely, a width of the top surface TS may be greater than awidth of the bottom surface BS.

The radius (R2+R3) of the second surface S2 may be 2 to 4 times a radiusR2 of the second concave portion A2.

The third surface S3 may be a surface connecting the first surface S1and the second surface S2. Namely, the third surface S3 may be a sidesurface connecting the upper surface and the lower surface of the lens300. The first surface S1 and the second surface S2 each have thecircular cross section, and the third surface S3 forms an outer surfaceconnecting the first surface S1 and the second surface S2. Therefore,the lens 300 may have an outline of a cylindrical shape having a heightH. In the cylindrical shape of the lens 300, at least a portion of thefirst to third surfaces S1 to S3 may be changed.

FIG. 54 shows an example of a light path of a lens shown in FIG. 52.

As shown in FIG. 54, the lens 300 according to the embodiment of theinvention may control a path LP of light and may cause the light to beuniformly transferred to the optical sheet 125. In particular, the lens300 according to the embodiment of the invention may change the path LPof light emitted from the side of the light source 203.

The light emitted from the side of the light source 203 may be firstlydiffused from the second concave portion A2. Namely, as described above,the light path LP may be radiated due to a shape of a third area A2R ofthe second concave portion A2.

The light path LP distributed from the side of the second concaveportion A2 may be again radiated via a curved surface S32 of the thirdsurface S3.

At least a portion of the light path LP passing through the secondconcave portion A2, etc., may be refracted and/or reflected from thefirst concave portion A1. Thus, the light path LP may be prevented frombeing concentrated on a specific location. As a result, light may beuniformly distributed on the optical sheet 125.

FIGS. 55 to 60 show a lens according to another example embodiment ofthe invention.

As shown in FIGS. 55 to 60, the lens 300 according to the embodiment ofthe invention may be variously configured.

As shown in FIG. 55, a curved surface S33 of the third surface S3 mayhave a shape protruding to the outside of the lens 300. For example, thecurved surface S33 may form a curved surface S32 corresponding to animaginary fourth circle C4 adjoining an external surface of the thirdsurface S3. The curved surface S33 may have the shape extending from thesecond surface S2 by a distance EA1.

As shown in FIG. 56, the plurality of light sources 203 may correspondto one lens 300. For example, first and second light sources 203 a and203 b may be positioned inside the second concave portion A2.

The light source 203 may have the relatively small size. The lightsource 203 may have a performance of high power. Thus, the first andsecond light sources 203 a and 203 b may correspond to one lens 300.

The second concave portion A2 may have an oval shape. For example, thesecond concave portion A2 may have the shape, in which a width A2W ofthe second concave portion A2 is greater than a height A2H of the secondconcave portion A2. The plurality of light sources 203 a and 203 b maybe positioned in a space obtained by configuring the second concaveportion A2 in the oval shape.

When the plurality of light sources 203 are positioned inside the secondconcave portion A2, the shape of the second concave portion A2 and/orthe curved surface S32 of the third surface S3 may importantly operatein the embodiment of the invention. Namely, because a large amount oflight may be generated from the sides of the first and second lightsources 203 a and 203 b, it is necessary to more efficiently control thelight emitted from the sides of the first and second light sources 203 aand 203 b. The embodiment of the invention may efficiently distributethe light emitted from the sides of the light sources through the curvedthird area A2R on the side of the second concave portion A2 and/or thecurved surface S32 on the lower side of the third surface S3.

As shown in FIG. 57, the third area A2R of the second concave portion A2may have the shape of a curved surface protruding to the outside of thelens 300. For example, the third area A2R may have the shape of thecurved surface corresponding to an imaginary fifth circle C5 adjoiningthe third area A2R of the second concave portion A2 outside the secondconcave portion A2. In this instance, a length of the second concaveportion A2 may extend by a distance EA2.

As shown in FIGS. 34 to 58, the embodiment of the invention may beapplied to the lens 300, which may be configured in the various shapes.

As shown in FIG. 58, the third surface S3 may have a shape inclined at apredetermined angle. For example, the third surface S3 may have theshape inclined to the inside by an angle S3D based on the vertical line.

The third surface S3 may include a straight surface S31 and a curvedsurface S32. The curved surface S32 may be connected to the secondsurface S2.

The third area A2R may be formed on the second concave portion A2.Namely, a curved surface may be formed in an area extending from thelower side of the second concave portion A2 to the bottom surface BS.The light emitted from the light source may be distributed due to thethird area A2R. In particular, the third area A2R may improve theuniformity of the light emitted from the side of the light source.

As shown in FIG. 59, a predetermined curved surface S32 may be formed inan area where the third surface S3 of the lens 300 and the bottomsurface BS meet.

Third areas A2R1 and A2R2 may be formed on the second concave portionA2. Namely, a curved surface may be formed in a portion of an area wherethe second concave portion A2 and the bottom surface BS meet. The thirdareas A2R1 and A2R2 may include a 3 a area A2R1 and a 3 b area A2R2.Namely, a plurality of curved surfaces may be formed in a plurality ofareas where the second concave portion A2 and the bottom surface BSmeet.

As shown in FIG. 60, a curved surface S32 may be formed in an area wherethe third surface S3 of the lens 300 and the bottom surface BS meet. Thethird area A2R of the curved surface may be formed on the second concaveportion A2.

FIGS. 61 and 62 show a disposition of a light assembly according toanother example embodiment of the invention.

As shown in FIGS. 61 and 62, the light assembly 124 may be positioned onthe frame 130. The light assembly 124 may be configured in variousshapes depending on a location. The light assembly 124 may include atleast one of the lenses 300 having the above-described shapes. Thus, acontrast or a hot spot resulting from the lens 300 may be prevented frombeing generated.

As shown in (a) of FIG. 61, the light assembly 124 may be positioned onthe frame 130. In FIGS. 61 and 62, alphabets “A” and “B” indicate thelight assembly 124. Namely, the light assemblies 124 may be arranged inthe horizontal and vertical directions.

The light assemblies 124 shown in (a) of FIG. 61 may the “A” type lightassemblies 124. For example, the light assembly 124 including the lens300 of the specific shape may be positioned.

As shown in (b) of FIG. 61, the “A” type light assemblies 124 and the“B” type light assemblies 124 may be arranged. For example, the lightassemblies 124 including the lenses 300 of two types may be arranged. Inthis instance, the “B” type light assemblies 124 may be arranged on theoutermost side of an array of the light assemblies 124, and the “A” typelight assemblies 124 may be arranged in an inner area of the array.

The light assemblies 124 different from the light assemblies 124arranged in the inner area of the array may be arranged on the outermostside of the array. Thus, the light assembly 124 positioned on theoutermost side of the array may include the lens 300 different from thelight assembly 124 positioned in the inner area of the array, so as touniformly distribute light.

As shown in (a) and (b) of FIG. 62, the light assemblies 124 of at leasttwo types may be alternately arranged. For example, the light assemblies124 each including the “A” type lens 300 and the light assemblies 124each including the “B” type lens 300 may be alternately arranged in thehorizontal direction or the vertical direction.

The embodiments and/or the configurations of the invention may becombined with each other. For example, a configuration “A” described inone embodiment of the invention and the drawings and a configuration “B”described in another embodiment of the invention and the drawings may becombined with each other. Namely, although the combination between theconfigurations is not directly described, the combination is possibleexcept in the instance where it is described that the combination isimpossible. This is certain considering that the embodiment of theinvention relates to the display device.

Any reference in this specification to “one embodiment,” “anembodiment,” “exemplary embodiment,” etc., means that a particularfeature, structure, or characteristic described in connection with theembodiment is included in at least one embodiment of the invention. Theappearances of such phrases in various places in the specification arenot necessarily all referring to the same embodiment. Further, when aparticular feature, structure, or characteristic is described inconnection with any embodiment, it is submitted that it is within thepurview of one skilled in the art to effect such feature, structure, orcharacteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the scope of the principles of thisdisclosure. More particularly, various variations and modifications arepossible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

What is claimed is:
 1. A backlight unit comprising: a frame including abottom and a sidewall extending from the bottom; at least one substratelocated on the frame, and a plurality of light sources mount on the atleast one substrate; and a reflecting sheet located on the at least onesubstrate, wherein the reflecting sheet comprises: a first sheet partlocated on the bottom, the first sheet part including a plurality ofholes corresponding to the plurality of the light sources; a secondsheet part extended from the first sheet part; and a third sheet partextended from the second sheet part and located on the sidewall; whereinthe second sheet part comprises a plurality of dot areas positionedsequentially in a direction from the first sheet part to the third sheetpart and the plurality of dot areas include a first dot area and asecond dot area, the first dot area including a plurality of dots havingthe same size and the second dot area including a plurality of dotshaving the same size, and wherein a size of the plurality of dots in thefirst dot area is different from a size of the plurality of dots in thesecond dot area.
 2. The backlight unit of claim 1, further comprising atleast one of a diffusion plate and an optical sheet located on thereflecting sheet.
 3. The backlight unit of claim 1, further comprising aplurality of lenses located on the plurality of light sources.
 4. Thebacklight unit of claim 1, further comprising a plurality of pins fixingthe reflecting sheet to the frame.
 5. The backlight unit of claim 4,wherein the plurality of pins are arranged outside of the plurality ofholes.
 6. The backlight unit of claim 5, wherein the plurality of pinsare arranged in a row.
 7. The backlight unit of claim 6, wherein thefirst sheet part and the second sheet part are delineated by theplurality of pins.
 8. The backlight unit of claim 4, wherein at leastone of the plurality of pins is arranged between at least two outermostholes of the plurality of holes arranged along a short side of thereflecting sheet.
 9. The backlight unit of claim 1, wherein a distancebetween a dot area along a first side of the reflecting sheet and anoutermost hole of the plurality of holes along the first side is greaterthan a distance between a dot area along a second side of the reflectingsheet and an outermost hole of the plurality of holes along the secondside.
 10. The backlight unit of claim 1, wherein a bent area ispositioned at each of boundaries between the first sheet part and thesecond sheet part and between the second sheet part and third sheetpart.
 11. The backlight unit of claim 1, wherein the second sheet partis rounded.
 12. The backlight unit of claim 11, wherein a slope of thesecond sheet part increases as the slope goes towards the third sheetpart.
 13. The backlight unit of claim 12, wherein sizes of the pluralityof dots in the second sheet part vary depending on the increase in theslope.
 14. The backlight unit of claim 13, wherein the sizes of theplurality of dots in the second sheet part increase as the slopeincreases.
 15. The backlight unit of claim 1, wherein, in a corner ofthe reflecting sheet, a shape of a dot area along a first side of thereflecting sheet and a shape of a dot area along a second side of thereflecting sheet are asymmetric.
 16. The backlight unit of claim 1,further comprising a cut line on a corner of the reflecting sheet,wherein a distance between a specific point on the cut line and a dotnearest to the cut line in a direction parallel to a first side of thereflecting sheet is different from a distance between the specific pointand a dot nearest to the cutting line in a direction parallel to asecond side of the reflecting sheet.
 17. The backlight unit of claim 1,wherein the second sheet part comprises a non-dot area adjacent to thethird sheet part.
 18. The backlight unit of claim 17, wherein a width ofthe non-dot area is greater than a distance between adjacent dots of theplurality of dots.
 19. The backlight unit of claim 1, wherein the firstsheet part and the third sheet part contact the frame, and the secondsheet part is separated from the frame.
 20. The backlight unit of claim1, wherein a distance of adjacent dots of the plurality of dots in thefirst dot area is different from a distance of adjacent dots of theplurality of dots in the second dot area.
 21. The backlight unit ofclaim 1, wherein the first dot area is located closer to the first sheetpart than the second dot area.